Jeep Wrangler High Idle Problem
08-17-2007, 11:09 PM
#51
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
ok tested.
closed: .938v
open: 3.9v
defective TPS?
On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
> You can do a voltage test on it.
>
> If you have the AC off and the key just in 'run' with the engine off and
> back probe the TPS plug with multimeter probes set to volts, it should
> be at .02 volts at idle and 4.8 volts at wide open.
>
> Mike
>
> 97tjMike wrote:
> > The Wrangler was in high idle today so I decided to investigate. I
> > disconnected the TPS Sensor and the idle went back down to its normal
> > RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
> > contacts, not help there. Perhaps the TPS is defective? It's still
> > under warranty so I can just bring it back.
>
> > Mike
>
> > On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
> >> The TPS is a resistance based switch just like a volume control. You
> >> can even test it with a multimeter set on ohms or live with the meter
> >> set on volts.
>
> >> If it has a bad connection, this connection has a resistance factor that
> >> isn't supposed to be there or an arcing issue which causes surges.
>
> >> When ours got a dirty connection, it would usually stall at the first
> >> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
> >> in the 90's that we needed a new TPS in our Cherokee, We just retired
> >> the Cherokee recently with that same 'dead' TPS in it....
>
> >> All the computer sensors are very low power items that are very touchy
> >> about their connections.
>
> >> A spray can of electronic contact cleaner will be a very good friend to
> >> you as the Jeep gets older. It will sure save you money, because
> >> changing out parts only fixes 'half' the connection...
>
> >> Mike
>
> >> 97tjMike wrote:
> >>> How would the TPS affect idle speed? From my understanding, it is just
> >>> a sending unit, meaning it can only give information to the PCM but
> >>> cannot receive and therefore manipulate any settings.
> >>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
> >>>> Will Honea wrote:
> >>>>> 97tjMike wrote:
> >>>>>> Hello Everyone:
> >>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
> >>>>>> 5% of the time, usually when the vehicle has been run for more than 20
> >>>>>> minutes or so, the idle in neutral or park will shoot up to between
> >>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
> >>>>>> vehicle into gear or to restart the car. If I restart it, it will not
> >>>>>> happen for a while, but it eventually comes back. The TPS was recently
> >>>>>> replaced, and I just replaced the idle air control valve, thinking
> >>>>>> this may have been the problem, but it still has the same effect. I'm
> >>>>>> thinking now that it may be the coolant temperature sensor (something
> >>>>>> wacky when the engine is hotter making the vehicle run at higher
> >>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
> >>>>> Clean the TPS connector. Go to an electronics parts store and buy some
> >>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
> >>>>> disconnect several times, blow dry, then use some dielectric grease on the
> >>>>> the connector seal ring to keep moisture out.
> >>>> Yup, replacing parts only cleans 'half' the connection.
> >>>> Mike
> >>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> >>>> Canadian Off Road Trips Photos: Non members can still view!
> >>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> >>>> (More Off Road album links at bottom of the view page)
closed: .938v
open: 3.9v
defective TPS?
On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
> You can do a voltage test on it.
>
> If you have the AC off and the key just in 'run' with the engine off and
> back probe the TPS plug with multimeter probes set to volts, it should
> be at .02 volts at idle and 4.8 volts at wide open.
>
> Mike
>
> 97tjMike wrote:
> > The Wrangler was in high idle today so I decided to investigate. I
> > disconnected the TPS Sensor and the idle went back down to its normal
> > RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
> > contacts, not help there. Perhaps the TPS is defective? It's still
> > under warranty so I can just bring it back.
>
> > Mike
>
> > On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
> >> The TPS is a resistance based switch just like a volume control. You
> >> can even test it with a multimeter set on ohms or live with the meter
> >> set on volts.
>
> >> If it has a bad connection, this connection has a resistance factor that
> >> isn't supposed to be there or an arcing issue which causes surges.
>
> >> When ours got a dirty connection, it would usually stall at the first
> >> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
> >> in the 90's that we needed a new TPS in our Cherokee, We just retired
> >> the Cherokee recently with that same 'dead' TPS in it....
>
> >> All the computer sensors are very low power items that are very touchy
> >> about their connections.
>
> >> A spray can of electronic contact cleaner will be a very good friend to
> >> you as the Jeep gets older. It will sure save you money, because
> >> changing out parts only fixes 'half' the connection...
>
> >> Mike
>
> >> 97tjMike wrote:
> >>> How would the TPS affect idle speed? From my understanding, it is just
> >>> a sending unit, meaning it can only give information to the PCM but
> >>> cannot receive and therefore manipulate any settings.
> >>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
> >>>> Will Honea wrote:
> >>>>> 97tjMike wrote:
> >>>>>> Hello Everyone:
> >>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
> >>>>>> 5% of the time, usually when the vehicle has been run for more than 20
> >>>>>> minutes or so, the idle in neutral or park will shoot up to between
> >>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
> >>>>>> vehicle into gear or to restart the car. If I restart it, it will not
> >>>>>> happen for a while, but it eventually comes back. The TPS was recently
> >>>>>> replaced, and I just replaced the idle air control valve, thinking
> >>>>>> this may have been the problem, but it still has the same effect. I'm
> >>>>>> thinking now that it may be the coolant temperature sensor (something
> >>>>>> wacky when the engine is hotter making the vehicle run at higher
> >>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
> >>>>> Clean the TPS connector. Go to an electronics parts store and buy some
> >>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
> >>>>> disconnect several times, blow dry, then use some dielectric grease on the
> >>>>> the connector seal ring to keep moisture out.
> >>>> Yup, replacing parts only cleans 'half' the connection.
> >>>> Mike
> >>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> >>>> Canadian Off Road Trips Photos: Non members can still view!
> >>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> >>>> (More Off Road album links at bottom of the view page)
08-17-2007, 11:09 PM
#52
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
ok tested.
closed: .938v
open: 3.9v
defective TPS?
On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
> You can do a voltage test on it.
>
> If you have the AC off and the key just in 'run' with the engine off and
> back probe the TPS plug with multimeter probes set to volts, it should
> be at .02 volts at idle and 4.8 volts at wide open.
>
> Mike
>
> 97tjMike wrote:
> > The Wrangler was in high idle today so I decided to investigate. I
> > disconnected the TPS Sensor and the idle went back down to its normal
> > RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
> > contacts, not help there. Perhaps the TPS is defective? It's still
> > under warranty so I can just bring it back.
>
> > Mike
>
> > On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
> >> The TPS is a resistance based switch just like a volume control. You
> >> can even test it with a multimeter set on ohms or live with the meter
> >> set on volts.
>
> >> If it has a bad connection, this connection has a resistance factor that
> >> isn't supposed to be there or an arcing issue which causes surges.
>
> >> When ours got a dirty connection, it would usually stall at the first
> >> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
> >> in the 90's that we needed a new TPS in our Cherokee, We just retired
> >> the Cherokee recently with that same 'dead' TPS in it....
>
> >> All the computer sensors are very low power items that are very touchy
> >> about their connections.
>
> >> A spray can of electronic contact cleaner will be a very good friend to
> >> you as the Jeep gets older. It will sure save you money, because
> >> changing out parts only fixes 'half' the connection...
>
> >> Mike
>
> >> 97tjMike wrote:
> >>> How would the TPS affect idle speed? From my understanding, it is just
> >>> a sending unit, meaning it can only give information to the PCM but
> >>> cannot receive and therefore manipulate any settings.
> >>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
> >>>> Will Honea wrote:
> >>>>> 97tjMike wrote:
> >>>>>> Hello Everyone:
> >>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
> >>>>>> 5% of the time, usually when the vehicle has been run for more than 20
> >>>>>> minutes or so, the idle in neutral or park will shoot up to between
> >>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
> >>>>>> vehicle into gear or to restart the car. If I restart it, it will not
> >>>>>> happen for a while, but it eventually comes back. The TPS was recently
> >>>>>> replaced, and I just replaced the idle air control valve, thinking
> >>>>>> this may have been the problem, but it still has the same effect. I'm
> >>>>>> thinking now that it may be the coolant temperature sensor (something
> >>>>>> wacky when the engine is hotter making the vehicle run at higher
> >>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
> >>>>> Clean the TPS connector. Go to an electronics parts store and buy some
> >>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
> >>>>> disconnect several times, blow dry, then use some dielectric grease on the
> >>>>> the connector seal ring to keep moisture out.
> >>>> Yup, replacing parts only cleans 'half' the connection.
> >>>> Mike
> >>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> >>>> Canadian Off Road Trips Photos: Non members can still view!
> >>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> >>>> (More Off Road album links at bottom of the view page)
closed: .938v
open: 3.9v
defective TPS?
On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
> You can do a voltage test on it.
>
> If you have the AC off and the key just in 'run' with the engine off and
> back probe the TPS plug with multimeter probes set to volts, it should
> be at .02 volts at idle and 4.8 volts at wide open.
>
> Mike
>
> 97tjMike wrote:
> > The Wrangler was in high idle today so I decided to investigate. I
> > disconnected the TPS Sensor and the idle went back down to its normal
> > RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
> > contacts, not help there. Perhaps the TPS is defective? It's still
> > under warranty so I can just bring it back.
>
> > Mike
>
> > On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
> >> The TPS is a resistance based switch just like a volume control. You
> >> can even test it with a multimeter set on ohms or live with the meter
> >> set on volts.
>
> >> If it has a bad connection, this connection has a resistance factor that
> >> isn't supposed to be there or an arcing issue which causes surges.
>
> >> When ours got a dirty connection, it would usually stall at the first
> >> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
> >> in the 90's that we needed a new TPS in our Cherokee, We just retired
> >> the Cherokee recently with that same 'dead' TPS in it....
>
> >> All the computer sensors are very low power items that are very touchy
> >> about their connections.
>
> >> A spray can of electronic contact cleaner will be a very good friend to
> >> you as the Jeep gets older. It will sure save you money, because
> >> changing out parts only fixes 'half' the connection...
>
> >> Mike
>
> >> 97tjMike wrote:
> >>> How would the TPS affect idle speed? From my understanding, it is just
> >>> a sending unit, meaning it can only give information to the PCM but
> >>> cannot receive and therefore manipulate any settings.
> >>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
> >>>> Will Honea wrote:
> >>>>> 97tjMike wrote:
> >>>>>> Hello Everyone:
> >>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
> >>>>>> 5% of the time, usually when the vehicle has been run for more than 20
> >>>>>> minutes or so, the idle in neutral or park will shoot up to between
> >>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
> >>>>>> vehicle into gear or to restart the car. If I restart it, it will not
> >>>>>> happen for a while, but it eventually comes back. The TPS was recently
> >>>>>> replaced, and I just replaced the idle air control valve, thinking
> >>>>>> this may have been the problem, but it still has the same effect. I'm
> >>>>>> thinking now that it may be the coolant temperature sensor (something
> >>>>>> wacky when the engine is hotter making the vehicle run at higher
> >>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
> >>>>> Clean the TPS connector. Go to an electronics parts store and buy some
> >>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
> >>>>> disconnect several times, blow dry, then use some dielectric grease on the
> >>>>> the connector seal ring to keep moisture out.
> >>>> Yup, replacing parts only cleans 'half' the connection.
> >>>> Mike
> >>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> >>>> Canadian Off Road Trips Photos: Non members can still view!
> >>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> >>>> (More Off Road album links at bottom of the view page)
08-17-2007, 11:09 PM
#53
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
ok tested.
closed: .938v
open: 3.9v
defective TPS?
On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
> You can do a voltage test on it.
>
> If you have the AC off and the key just in 'run' with the engine off and
> back probe the TPS plug with multimeter probes set to volts, it should
> be at .02 volts at idle and 4.8 volts at wide open.
>
> Mike
>
> 97tjMike wrote:
> > The Wrangler was in high idle today so I decided to investigate. I
> > disconnected the TPS Sensor and the idle went back down to its normal
> > RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
> > contacts, not help there. Perhaps the TPS is defective? It's still
> > under warranty so I can just bring it back.
>
> > Mike
>
> > On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
> >> The TPS is a resistance based switch just like a volume control. You
> >> can even test it with a multimeter set on ohms or live with the meter
> >> set on volts.
>
> >> If it has a bad connection, this connection has a resistance factor that
> >> isn't supposed to be there or an arcing issue which causes surges.
>
> >> When ours got a dirty connection, it would usually stall at the first
> >> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
> >> in the 90's that we needed a new TPS in our Cherokee, We just retired
> >> the Cherokee recently with that same 'dead' TPS in it....
>
> >> All the computer sensors are very low power items that are very touchy
> >> about their connections.
>
> >> A spray can of electronic contact cleaner will be a very good friend to
> >> you as the Jeep gets older. It will sure save you money, because
> >> changing out parts only fixes 'half' the connection...
>
> >> Mike
>
> >> 97tjMike wrote:
> >>> How would the TPS affect idle speed? From my understanding, it is just
> >>> a sending unit, meaning it can only give information to the PCM but
> >>> cannot receive and therefore manipulate any settings.
> >>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
> >>>> Will Honea wrote:
> >>>>> 97tjMike wrote:
> >>>>>> Hello Everyone:
> >>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
> >>>>>> 5% of the time, usually when the vehicle has been run for more than 20
> >>>>>> minutes or so, the idle in neutral or park will shoot up to between
> >>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
> >>>>>> vehicle into gear or to restart the car. If I restart it, it will not
> >>>>>> happen for a while, but it eventually comes back. The TPS was recently
> >>>>>> replaced, and I just replaced the idle air control valve, thinking
> >>>>>> this may have been the problem, but it still has the same effect. I'm
> >>>>>> thinking now that it may be the coolant temperature sensor (something
> >>>>>> wacky when the engine is hotter making the vehicle run at higher
> >>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
> >>>>> Clean the TPS connector. Go to an electronics parts store and buy some
> >>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
> >>>>> disconnect several times, blow dry, then use some dielectric grease on the
> >>>>> the connector seal ring to keep moisture out.
> >>>> Yup, replacing parts only cleans 'half' the connection.
> >>>> Mike
> >>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> >>>> Canadian Off Road Trips Photos: Non members can still view!
> >>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> >>>> (More Off Road album links at bottom of the view page)
closed: .938v
open: 3.9v
defective TPS?
On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
> You can do a voltage test on it.
>
> If you have the AC off and the key just in 'run' with the engine off and
> back probe the TPS plug with multimeter probes set to volts, it should
> be at .02 volts at idle and 4.8 volts at wide open.
>
> Mike
>
> 97tjMike wrote:
> > The Wrangler was in high idle today so I decided to investigate. I
> > disconnected the TPS Sensor and the idle went back down to its normal
> > RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
> > contacts, not help there. Perhaps the TPS is defective? It's still
> > under warranty so I can just bring it back.
>
> > Mike
>
> > On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
> >> The TPS is a resistance based switch just like a volume control. You
> >> can even test it with a multimeter set on ohms or live with the meter
> >> set on volts.
>
> >> If it has a bad connection, this connection has a resistance factor that
> >> isn't supposed to be there or an arcing issue which causes surges.
>
> >> When ours got a dirty connection, it would usually stall at the first
> >> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
> >> in the 90's that we needed a new TPS in our Cherokee, We just retired
> >> the Cherokee recently with that same 'dead' TPS in it....
>
> >> All the computer sensors are very low power items that are very touchy
> >> about their connections.
>
> >> A spray can of electronic contact cleaner will be a very good friend to
> >> you as the Jeep gets older. It will sure save you money, because
> >> changing out parts only fixes 'half' the connection...
>
> >> Mike
>
> >> 97tjMike wrote:
> >>> How would the TPS affect idle speed? From my understanding, it is just
> >>> a sending unit, meaning it can only give information to the PCM but
> >>> cannot receive and therefore manipulate any settings.
> >>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
> >>>> Will Honea wrote:
> >>>>> 97tjMike wrote:
> >>>>>> Hello Everyone:
> >>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
> >>>>>> 5% of the time, usually when the vehicle has been run for more than 20
> >>>>>> minutes or so, the idle in neutral or park will shoot up to between
> >>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
> >>>>>> vehicle into gear or to restart the car. If I restart it, it will not
> >>>>>> happen for a while, but it eventually comes back. The TPS was recently
> >>>>>> replaced, and I just replaced the idle air control valve, thinking
> >>>>>> this may have been the problem, but it still has the same effect. I'm
> >>>>>> thinking now that it may be the coolant temperature sensor (something
> >>>>>> wacky when the engine is hotter making the vehicle run at higher
> >>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
> >>>>> Clean the TPS connector. Go to an electronics parts store and buy some
> >>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
> >>>>> disconnect several times, blow dry, then use some dielectric grease on the
> >>>>> the connector seal ring to keep moisture out.
> >>>> Yup, replacing parts only cleans 'half' the connection.
> >>>> Mike
> >>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> >>>> Canadian Off Road Trips Photos: Non members can still view!
> >>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> >>>> (More Off Road album links at bottom of the view page)
08-17-2007, 11:32 PM
#54
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
Sure sounds like it. The idle reading it high.
Mike
97tjMike wrote:
> ok tested.
> closed: .938v
> open: 3.9v
>
> defective TPS?
>
>
> On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> You can do a voltage test on it.
>>
>> If you have the AC off and the key just in 'run' with the engine off and
>> back probe the TPS plug with multimeter probes set to volts, it should
>> be at .02 volts at idle and 4.8 volts at wide open.
>>
>> Mike
>>
>> 97tjMike wrote:
>>> The Wrangler was in high idle today so I decided to investigate. I
>>> disconnected the TPS Sensor and the idle went back down to its normal
>>> RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
>>> contacts, not help there. Perhaps the TPS is defective? It's still
>>> under warranty so I can just bring it back.
>>> Mike
>>> On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
>>>> The TPS is a resistance based switch just like a volume control. You
>>>> can even test it with a multimeter set on ohms or live with the meter
>>>> set on volts.
>>>> If it has a bad connection, this connection has a resistance factor that
>>>> isn't supposed to be there or an arcing issue which causes surges.
>>>> When ours got a dirty connection, it would usually stall at the first
>>>> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
>>>> in the 90's that we needed a new TPS in our Cherokee, We just retired
>>>> the Cherokee recently with that same 'dead' TPS in it....
>>>> All the computer sensors are very low power items that are very touchy
>>>> about their connections.
>>>> A spray can of electronic contact cleaner will be a very good friend to
>>>> you as the Jeep gets older. It will sure save you money, because
>>>> changing out parts only fixes 'half' the connection...
>>>> Mike
>>>> 97tjMike wrote:
>>>>> How would the TPS affect idle speed? From my understanding, it is just
>>>>> a sending unit, meaning it can only give information to the PCM but
>>>>> cannot receive and therefore manipulate any settings.
>>>>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>>>>> Will Honea wrote:
>>>>>>> 97tjMike wrote:
>>>>>>>> Hello Everyone:
>>>>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
>>>>>>>> 5% of the time, usually when the vehicle has been run for more than 20
>>>>>>>> minutes or so, the idle in neutral or park will shoot up to between
>>>>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
>>>>>>>> vehicle into gear or to restart the car. If I restart it, it will not
>>>>>>>> happen for a while, but it eventually comes back. The TPS was recently
>>>>>>>> replaced, and I just replaced the idle air control valve, thinking
>>>>>>>> this may have been the problem, but it still has the same effect. I'm
>>>>>>>> thinking now that it may be the coolant temperature sensor (something
>>>>>>>> wacky when the engine is hotter making the vehicle run at higher
>>>>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
>>>>>>> Clean the TPS connector. Go to an electronics parts store and buy some
>>>>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
>>>>>>> disconnect several times, blow dry, then use some dielectric grease on the
>>>>>>> the connector seal ring to keep moisture out.
>>>>>> Yup, replacing parts only cleans 'half' the connection.
>>>>>> Mike
>>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>>>>> (More Off Road album links at bottom of the view page)
>
>
Mike
97tjMike wrote:
> ok tested.
> closed: .938v
> open: 3.9v
>
> defective TPS?
>
>
> On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> You can do a voltage test on it.
>>
>> If you have the AC off and the key just in 'run' with the engine off and
>> back probe the TPS plug with multimeter probes set to volts, it should
>> be at .02 volts at idle and 4.8 volts at wide open.
>>
>> Mike
>>
>> 97tjMike wrote:
>>> The Wrangler was in high idle today so I decided to investigate. I
>>> disconnected the TPS Sensor and the idle went back down to its normal
>>> RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
>>> contacts, not help there. Perhaps the TPS is defective? It's still
>>> under warranty so I can just bring it back.
>>> Mike
>>> On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
>>>> The TPS is a resistance based switch just like a volume control. You
>>>> can even test it with a multimeter set on ohms or live with the meter
>>>> set on volts.
>>>> If it has a bad connection, this connection has a resistance factor that
>>>> isn't supposed to be there or an arcing issue which causes surges.
>>>> When ours got a dirty connection, it would usually stall at the first
>>>> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
>>>> in the 90's that we needed a new TPS in our Cherokee, We just retired
>>>> the Cherokee recently with that same 'dead' TPS in it....
>>>> All the computer sensors are very low power items that are very touchy
>>>> about their connections.
>>>> A spray can of electronic contact cleaner will be a very good friend to
>>>> you as the Jeep gets older. It will sure save you money, because
>>>> changing out parts only fixes 'half' the connection...
>>>> Mike
>>>> 97tjMike wrote:
>>>>> How would the TPS affect idle speed? From my understanding, it is just
>>>>> a sending unit, meaning it can only give information to the PCM but
>>>>> cannot receive and therefore manipulate any settings.
>>>>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>>>>> Will Honea wrote:
>>>>>>> 97tjMike wrote:
>>>>>>>> Hello Everyone:
>>>>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
>>>>>>>> 5% of the time, usually when the vehicle has been run for more than 20
>>>>>>>> minutes or so, the idle in neutral or park will shoot up to between
>>>>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
>>>>>>>> vehicle into gear or to restart the car. If I restart it, it will not
>>>>>>>> happen for a while, but it eventually comes back. The TPS was recently
>>>>>>>> replaced, and I just replaced the idle air control valve, thinking
>>>>>>>> this may have been the problem, but it still has the same effect. I'm
>>>>>>>> thinking now that it may be the coolant temperature sensor (something
>>>>>>>> wacky when the engine is hotter making the vehicle run at higher
>>>>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
>>>>>>> Clean the TPS connector. Go to an electronics parts store and buy some
>>>>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
>>>>>>> disconnect several times, blow dry, then use some dielectric grease on the
>>>>>>> the connector seal ring to keep moisture out.
>>>>>> Yup, replacing parts only cleans 'half' the connection.
>>>>>> Mike
>>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>>>>> (More Off Road album links at bottom of the view page)
>
>
08-17-2007, 11:32 PM
#55
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
Sure sounds like it. The idle reading it high.
Mike
97tjMike wrote:
> ok tested.
> closed: .938v
> open: 3.9v
>
> defective TPS?
>
>
> On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> You can do a voltage test on it.
>>
>> If you have the AC off and the key just in 'run' with the engine off and
>> back probe the TPS plug with multimeter probes set to volts, it should
>> be at .02 volts at idle and 4.8 volts at wide open.
>>
>> Mike
>>
>> 97tjMike wrote:
>>> The Wrangler was in high idle today so I decided to investigate. I
>>> disconnected the TPS Sensor and the idle went back down to its normal
>>> RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
>>> contacts, not help there. Perhaps the TPS is defective? It's still
>>> under warranty so I can just bring it back.
>>> Mike
>>> On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
>>>> The TPS is a resistance based switch just like a volume control. You
>>>> can even test it with a multimeter set on ohms or live with the meter
>>>> set on volts.
>>>> If it has a bad connection, this connection has a resistance factor that
>>>> isn't supposed to be there or an arcing issue which causes surges.
>>>> When ours got a dirty connection, it would usually stall at the first
>>>> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
>>>> in the 90's that we needed a new TPS in our Cherokee, We just retired
>>>> the Cherokee recently with that same 'dead' TPS in it....
>>>> All the computer sensors are very low power items that are very touchy
>>>> about their connections.
>>>> A spray can of electronic contact cleaner will be a very good friend to
>>>> you as the Jeep gets older. It will sure save you money, because
>>>> changing out parts only fixes 'half' the connection...
>>>> Mike
>>>> 97tjMike wrote:
>>>>> How would the TPS affect idle speed? From my understanding, it is just
>>>>> a sending unit, meaning it can only give information to the PCM but
>>>>> cannot receive and therefore manipulate any settings.
>>>>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>>>>> Will Honea wrote:
>>>>>>> 97tjMike wrote:
>>>>>>>> Hello Everyone:
>>>>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
>>>>>>>> 5% of the time, usually when the vehicle has been run for more than 20
>>>>>>>> minutes or so, the idle in neutral or park will shoot up to between
>>>>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
>>>>>>>> vehicle into gear or to restart the car. If I restart it, it will not
>>>>>>>> happen for a while, but it eventually comes back. The TPS was recently
>>>>>>>> replaced, and I just replaced the idle air control valve, thinking
>>>>>>>> this may have been the problem, but it still has the same effect. I'm
>>>>>>>> thinking now that it may be the coolant temperature sensor (something
>>>>>>>> wacky when the engine is hotter making the vehicle run at higher
>>>>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
>>>>>>> Clean the TPS connector. Go to an electronics parts store and buy some
>>>>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
>>>>>>> disconnect several times, blow dry, then use some dielectric grease on the
>>>>>>> the connector seal ring to keep moisture out.
>>>>>> Yup, replacing parts only cleans 'half' the connection.
>>>>>> Mike
>>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>>>>> (More Off Road album links at bottom of the view page)
>
>
Mike
97tjMike wrote:
> ok tested.
> closed: .938v
> open: 3.9v
>
> defective TPS?
>
>
> On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> You can do a voltage test on it.
>>
>> If you have the AC off and the key just in 'run' with the engine off and
>> back probe the TPS plug with multimeter probes set to volts, it should
>> be at .02 volts at idle and 4.8 volts at wide open.
>>
>> Mike
>>
>> 97tjMike wrote:
>>> The Wrangler was in high idle today so I decided to investigate. I
>>> disconnected the TPS Sensor and the idle went back down to its normal
>>> RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
>>> contacts, not help there. Perhaps the TPS is defective? It's still
>>> under warranty so I can just bring it back.
>>> Mike
>>> On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
>>>> The TPS is a resistance based switch just like a volume control. You
>>>> can even test it with a multimeter set on ohms or live with the meter
>>>> set on volts.
>>>> If it has a bad connection, this connection has a resistance factor that
>>>> isn't supposed to be there or an arcing issue which causes surges.
>>>> When ours got a dirty connection, it would usually stall at the first
>>>> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
>>>> in the 90's that we needed a new TPS in our Cherokee, We just retired
>>>> the Cherokee recently with that same 'dead' TPS in it....
>>>> All the computer sensors are very low power items that are very touchy
>>>> about their connections.
>>>> A spray can of electronic contact cleaner will be a very good friend to
>>>> you as the Jeep gets older. It will sure save you money, because
>>>> changing out parts only fixes 'half' the connection...
>>>> Mike
>>>> 97tjMike wrote:
>>>>> How would the TPS affect idle speed? From my understanding, it is just
>>>>> a sending unit, meaning it can only give information to the PCM but
>>>>> cannot receive and therefore manipulate any settings.
>>>>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>>>>> Will Honea wrote:
>>>>>>> 97tjMike wrote:
>>>>>>>> Hello Everyone:
>>>>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
>>>>>>>> 5% of the time, usually when the vehicle has been run for more than 20
>>>>>>>> minutes or so, the idle in neutral or park will shoot up to between
>>>>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
>>>>>>>> vehicle into gear or to restart the car. If I restart it, it will not
>>>>>>>> happen for a while, but it eventually comes back. The TPS was recently
>>>>>>>> replaced, and I just replaced the idle air control valve, thinking
>>>>>>>> this may have been the problem, but it still has the same effect. I'm
>>>>>>>> thinking now that it may be the coolant temperature sensor (something
>>>>>>>> wacky when the engine is hotter making the vehicle run at higher
>>>>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
>>>>>>> Clean the TPS connector. Go to an electronics parts store and buy some
>>>>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
>>>>>>> disconnect several times, blow dry, then use some dielectric grease on the
>>>>>>> the connector seal ring to keep moisture out.
>>>>>> Yup, replacing parts only cleans 'half' the connection.
>>>>>> Mike
>>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>>>>> (More Off Road album links at bottom of the view page)
>
>
08-17-2007, 11:32 PM
#56
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
Sure sounds like it. The idle reading it high.
Mike
97tjMike wrote:
> ok tested.
> closed: .938v
> open: 3.9v
>
> defective TPS?
>
>
> On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> You can do a voltage test on it.
>>
>> If you have the AC off and the key just in 'run' with the engine off and
>> back probe the TPS plug with multimeter probes set to volts, it should
>> be at .02 volts at idle and 4.8 volts at wide open.
>>
>> Mike
>>
>> 97tjMike wrote:
>>> The Wrangler was in high idle today so I decided to investigate. I
>>> disconnected the TPS Sensor and the idle went back down to its normal
>>> RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
>>> contacts, not help there. Perhaps the TPS is defective? It's still
>>> under warranty so I can just bring it back.
>>> Mike
>>> On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
>>>> The TPS is a resistance based switch just like a volume control. You
>>>> can even test it with a multimeter set on ohms or live with the meter
>>>> set on volts.
>>>> If it has a bad connection, this connection has a resistance factor that
>>>> isn't supposed to be there or an arcing issue which causes surges.
>>>> When ours got a dirty connection, it would usually stall at the first
>>>> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
>>>> in the 90's that we needed a new TPS in our Cherokee, We just retired
>>>> the Cherokee recently with that same 'dead' TPS in it....
>>>> All the computer sensors are very low power items that are very touchy
>>>> about their connections.
>>>> A spray can of electronic contact cleaner will be a very good friend to
>>>> you as the Jeep gets older. It will sure save you money, because
>>>> changing out parts only fixes 'half' the connection...
>>>> Mike
>>>> 97tjMike wrote:
>>>>> How would the TPS affect idle speed? From my understanding, it is just
>>>>> a sending unit, meaning it can only give information to the PCM but
>>>>> cannot receive and therefore manipulate any settings.
>>>>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>>>>> Will Honea wrote:
>>>>>>> 97tjMike wrote:
>>>>>>>> Hello Everyone:
>>>>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
>>>>>>>> 5% of the time, usually when the vehicle has been run for more than 20
>>>>>>>> minutes or so, the idle in neutral or park will shoot up to between
>>>>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
>>>>>>>> vehicle into gear or to restart the car. If I restart it, it will not
>>>>>>>> happen for a while, but it eventually comes back. The TPS was recently
>>>>>>>> replaced, and I just replaced the idle air control valve, thinking
>>>>>>>> this may have been the problem, but it still has the same effect. I'm
>>>>>>>> thinking now that it may be the coolant temperature sensor (something
>>>>>>>> wacky when the engine is hotter making the vehicle run at higher
>>>>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
>>>>>>> Clean the TPS connector. Go to an electronics parts store and buy some
>>>>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
>>>>>>> disconnect several times, blow dry, then use some dielectric grease on the
>>>>>>> the connector seal ring to keep moisture out.
>>>>>> Yup, replacing parts only cleans 'half' the connection.
>>>>>> Mike
>>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>>>>> (More Off Road album links at bottom of the view page)
>
>
Mike
97tjMike wrote:
> ok tested.
> closed: .938v
> open: 3.9v
>
> defective TPS?
>
>
> On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> You can do a voltage test on it.
>>
>> If you have the AC off and the key just in 'run' with the engine off and
>> back probe the TPS plug with multimeter probes set to volts, it should
>> be at .02 volts at idle and 4.8 volts at wide open.
>>
>> Mike
>>
>> 97tjMike wrote:
>>> The Wrangler was in high idle today so I decided to investigate. I
>>> disconnected the TPS Sensor and the idle went back down to its normal
>>> RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
>>> contacts, not help there. Perhaps the TPS is defective? It's still
>>> under warranty so I can just bring it back.
>>> Mike
>>> On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
>>>> The TPS is a resistance based switch just like a volume control. You
>>>> can even test it with a multimeter set on ohms or live with the meter
>>>> set on volts.
>>>> If it has a bad connection, this connection has a resistance factor that
>>>> isn't supposed to be there or an arcing issue which causes surges.
>>>> When ours got a dirty connection, it would usually stall at the first
>>>> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
>>>> in the 90's that we needed a new TPS in our Cherokee, We just retired
>>>> the Cherokee recently with that same 'dead' TPS in it....
>>>> All the computer sensors are very low power items that are very touchy
>>>> about their connections.
>>>> A spray can of electronic contact cleaner will be a very good friend to
>>>> you as the Jeep gets older. It will sure save you money, because
>>>> changing out parts only fixes 'half' the connection...
>>>> Mike
>>>> 97tjMike wrote:
>>>>> How would the TPS affect idle speed? From my understanding, it is just
>>>>> a sending unit, meaning it can only give information to the PCM but
>>>>> cannot receive and therefore manipulate any settings.
>>>>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>>>>> Will Honea wrote:
>>>>>>> 97tjMike wrote:
>>>>>>>> Hello Everyone:
>>>>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
>>>>>>>> 5% of the time, usually when the vehicle has been run for more than 20
>>>>>>>> minutes or so, the idle in neutral or park will shoot up to between
>>>>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
>>>>>>>> vehicle into gear or to restart the car. If I restart it, it will not
>>>>>>>> happen for a while, but it eventually comes back. The TPS was recently
>>>>>>>> replaced, and I just replaced the idle air control valve, thinking
>>>>>>>> this may have been the problem, but it still has the same effect. I'm
>>>>>>>> thinking now that it may be the coolant temperature sensor (something
>>>>>>>> wacky when the engine is hotter making the vehicle run at higher
>>>>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
>>>>>>> Clean the TPS connector. Go to an electronics parts store and buy some
>>>>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
>>>>>>> disconnect several times, blow dry, then use some dielectric grease on the
>>>>>>> the connector seal ring to keep moisture out.
>>>>>> Yup, replacing parts only cleans 'half' the connection.
>>>>>> Mike
>>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>>>>> (More Off Road album links at bottom of the view page)
>
>
08-17-2007, 11:32 PM
#57
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
Sure sounds like it. The idle reading it high.
Mike
97tjMike wrote:
> ok tested.
> closed: .938v
> open: 3.9v
>
> defective TPS?
>
>
> On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> You can do a voltage test on it.
>>
>> If you have the AC off and the key just in 'run' with the engine off and
>> back probe the TPS plug with multimeter probes set to volts, it should
>> be at .02 volts at idle and 4.8 volts at wide open.
>>
>> Mike
>>
>> 97tjMike wrote:
>>> The Wrangler was in high idle today so I decided to investigate. I
>>> disconnected the TPS Sensor and the idle went back down to its normal
>>> RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
>>> contacts, not help there. Perhaps the TPS is defective? It's still
>>> under warranty so I can just bring it back.
>>> Mike
>>> On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
>>>> The TPS is a resistance based switch just like a volume control. You
>>>> can even test it with a multimeter set on ohms or live with the meter
>>>> set on volts.
>>>> If it has a bad connection, this connection has a resistance factor that
>>>> isn't supposed to be there or an arcing issue which causes surges.
>>>> When ours got a dirty connection, it would usually stall at the first
>>>> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
>>>> in the 90's that we needed a new TPS in our Cherokee, We just retired
>>>> the Cherokee recently with that same 'dead' TPS in it....
>>>> All the computer sensors are very low power items that are very touchy
>>>> about their connections.
>>>> A spray can of electronic contact cleaner will be a very good friend to
>>>> you as the Jeep gets older. It will sure save you money, because
>>>> changing out parts only fixes 'half' the connection...
>>>> Mike
>>>> 97tjMike wrote:
>>>>> How would the TPS affect idle speed? From my understanding, it is just
>>>>> a sending unit, meaning it can only give information to the PCM but
>>>>> cannot receive and therefore manipulate any settings.
>>>>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>>>>> Will Honea wrote:
>>>>>>> 97tjMike wrote:
>>>>>>>> Hello Everyone:
>>>>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
>>>>>>>> 5% of the time, usually when the vehicle has been run for more than 20
>>>>>>>> minutes or so, the idle in neutral or park will shoot up to between
>>>>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
>>>>>>>> vehicle into gear or to restart the car. If I restart it, it will not
>>>>>>>> happen for a while, but it eventually comes back. The TPS was recently
>>>>>>>> replaced, and I just replaced the idle air control valve, thinking
>>>>>>>> this may have been the problem, but it still has the same effect. I'm
>>>>>>>> thinking now that it may be the coolant temperature sensor (something
>>>>>>>> wacky when the engine is hotter making the vehicle run at higher
>>>>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
>>>>>>> Clean the TPS connector. Go to an electronics parts store and buy some
>>>>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
>>>>>>> disconnect several times, blow dry, then use some dielectric grease on the
>>>>>>> the connector seal ring to keep moisture out.
>>>>>> Yup, replacing parts only cleans 'half' the connection.
>>>>>> Mike
>>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>>>>> (More Off Road album links at bottom of the view page)
>
>
Mike
97tjMike wrote:
> ok tested.
> closed: .938v
> open: 3.9v
>
> defective TPS?
>
>
> On Aug 15, 5:50 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> You can do a voltage test on it.
>>
>> If you have the AC off and the key just in 'run' with the engine off and
>> back probe the TPS plug with multimeter probes set to volts, it should
>> be at .02 volts at idle and 4.8 volts at wide open.
>>
>> Mike
>>
>> 97tjMike wrote:
>>> The Wrangler was in high idle today so I decided to investigate. I
>>> disconnected the TPS Sensor and the idle went back down to its normal
>>> RPMs. I then reconnected it and the RPMs went back up. Tried cleaning
>>> contacts, not help there. Perhaps the TPS is defective? It's still
>>> under warranty so I can just bring it back.
>>> Mike
>>> On Aug 14, 9:58 am, Mike Romain <roma...@sympatico.ca> wrote:
>>>> The TPS is a resistance based switch just like a volume control. You
>>>> can even test it with a multimeter set on ohms or live with the meter
>>>> set on volts.
>>>> If it has a bad connection, this connection has a resistance factor that
>>>> isn't supposed to be there or an arcing issue which causes surges.
>>>> When ours got a dirty connection, it would usually stall at the first
>>>> stop and get stuck on a 1500 to 2000 rpm fast idle. We were told back
>>>> in the 90's that we needed a new TPS in our Cherokee, We just retired
>>>> the Cherokee recently with that same 'dead' TPS in it....
>>>> All the computer sensors are very low power items that are very touchy
>>>> about their connections.
>>>> A spray can of electronic contact cleaner will be a very good friend to
>>>> you as the Jeep gets older. It will sure save you money, because
>>>> changing out parts only fixes 'half' the connection...
>>>> Mike
>>>> 97tjMike wrote:
>>>>> How would the TPS affect idle speed? From my understanding, it is just
>>>>> a sending unit, meaning it can only give information to the PCM but
>>>>> cannot receive and therefore manipulate any settings.
>>>>> On Aug 13, 1:47 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>>>>> Will Honea wrote:
>>>>>>> 97tjMike wrote:
>>>>>>>> Hello Everyone:
>>>>>>>> I have a 97 TJ and 95% of the time it idles perfectly. However, about
>>>>>>>> 5% of the time, usually when the vehicle has been run for more than 20
>>>>>>>> minutes or so, the idle in neutral or park will shoot up to between
>>>>>>>> 1200 and 1500 RPM. The only way to get it to stop is to put the
>>>>>>>> vehicle into gear or to restart the car. If I restart it, it will not
>>>>>>>> happen for a while, but it eventually comes back. The TPS was recently
>>>>>>>> replaced, and I just replaced the idle air control valve, thinking
>>>>>>>> this may have been the problem, but it still has the same effect. I'm
>>>>>>>> thinking now that it may be the coolant temperature sensor (something
>>>>>>>> wacky when the engine is hotter making the vehicle run at higher
>>>>>>>> speeds??). Any suggestions? I'm hoping its not my computer...
>>>>>>> Clean the TPS connector. Go to an electronics parts store and buy some
>>>>>>> contact cleaner or WD40 works. Disconnect the TPS, clean, connect and
>>>>>>> disconnect several times, blow dry, then use some dielectric grease on the
>>>>>>> the connector seal ring to keep moisture out.
>>>>>> Yup, replacing parts only cleans 'half' the connection.
>>>>>> Mike
>>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>>>>> (More Off Road album links at bottom of the view page)
>
>
08-18-2007, 02:23 AM
#58
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
Mike Romain wrote:
> Sure sounds like it. The idle reading it high.
>
Throttle closed > 200 milliVolts
Throttle wide open < 4.8 Volts
Anything in that range will adjust. The way you
3.9 is low as well.
Measure the outer two pins to make sure your getting
close to 5V.
Before getting a new one, run the old one back and
forth a few dozen times with the engine off, then
measure again. Also make sure the connector is clean
and free of crudbunnies.
> 97tjMike wrote:
>> ok tested.
>> closed: .938v
>> open: 3.9v
>>
>> defective TPS?
> Sure sounds like it. The idle reading it high.
>
Throttle closed > 200 milliVolts
Throttle wide open < 4.8 Volts
Anything in that range will adjust. The way you
3.9 is low as well.
Measure the outer two pins to make sure your getting
close to 5V.
Before getting a new one, run the old one back and
forth a few dozen times with the engine off, then
measure again. Also make sure the connector is clean
and free of crudbunnies.
> 97tjMike wrote:
>> ok tested.
>> closed: .938v
>> open: 3.9v
>>
>> defective TPS?
08-18-2007, 02:23 AM
#59
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
Mike Romain wrote:
> Sure sounds like it. The idle reading it high.
>
Throttle closed > 200 milliVolts
Throttle wide open < 4.8 Volts
Anything in that range will adjust. The way you
3.9 is low as well.
Measure the outer two pins to make sure your getting
close to 5V.
Before getting a new one, run the old one back and
forth a few dozen times with the engine off, then
measure again. Also make sure the connector is clean
and free of crudbunnies.
> 97tjMike wrote:
>> ok tested.
>> closed: .938v
>> open: 3.9v
>>
>> defective TPS?
> Sure sounds like it. The idle reading it high.
>
Throttle closed > 200 milliVolts
Throttle wide open < 4.8 Volts
Anything in that range will adjust. The way you
3.9 is low as well.
Measure the outer two pins to make sure your getting
close to 5V.
Before getting a new one, run the old one back and
forth a few dozen times with the engine off, then
measure again. Also make sure the connector is clean
and free of crudbunnies.
> 97tjMike wrote:
>> ok tested.
>> closed: .938v
>> open: 3.9v
>>
>> defective TPS?
08-18-2007, 02:23 AM
#60
Guest
Posts: n/a
Re: Jeep Wrangler High Idle Problem
Mike Romain wrote:
> Sure sounds like it. The idle reading it high.
>
Throttle closed > 200 milliVolts
Throttle wide open < 4.8 Volts
Anything in that range will adjust. The way you
3.9 is low as well.
Measure the outer two pins to make sure your getting
close to 5V.
Before getting a new one, run the old one back and
forth a few dozen times with the engine off, then
measure again. Also make sure the connector is clean
and free of crudbunnies.
> 97tjMike wrote:
>> ok tested.
>> closed: .938v
>> open: 3.9v
>>
>> defective TPS?
> Sure sounds like it. The idle reading it high.
>
Throttle closed > 200 milliVolts
Throttle wide open < 4.8 Volts
Anything in that range will adjust. The way you
3.9 is low as well.
Measure the outer two pins to make sure your getting
close to 5V.
Before getting a new one, run the old one back and
forth a few dozen times with the engine off, then
measure again. Also make sure the connector is clean
and free of crudbunnies.
> 97tjMike wrote:
>> ok tested.
>> closed: .938v
>> open: 3.9v
>>
>> defective TPS?