YJ No Spark
#31
Guest
Posts: n/a
Re: YJ No Spark
In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>Nope, the CPS doesn't have any current flowing through it unless the
>engine is running... and then that current is self-generated. :)
The crank sensor operates on voltage that is supplied by the PCM anytime the key
is on, running or not, and does not generate current.
>
>Jerry
>
>Dave Lee wrote:
>> Interesting. Now, I was having trouble before it died, and one morning I
>> went to the jeep and found the key in the on position, heater fan blowing.
>> Would juice through the ignition wires overnight hasten its demise??
>> "L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>> news:420911CF.57916359@***.net...
>>
>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>Sensor:
>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>> God Bless America, ßill O|||||||O
>>>mailto:-------------------- http://www.----------.com/
>>>
>>>Dave Lee wrote:
>>>
>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>coil.
>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>starter, or thereabouts down there.
>>>>
>>>>Any ideas?
>>>
>>
>>
>Nope, the CPS doesn't have any current flowing through it unless the
>engine is running... and then that current is self-generated. :)
The crank sensor operates on voltage that is supplied by the PCM anytime the key
is on, running or not, and does not generate current.
>
>Jerry
>
>Dave Lee wrote:
>> Interesting. Now, I was having trouble before it died, and one morning I
>> went to the jeep and found the key in the on position, heater fan blowing.
>> Would juice through the ignition wires overnight hasten its demise??
>> "L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>> news:420911CF.57916359@***.net...
>>
>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>Sensor:
>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>> God Bless America, ßill O|||||||O
>>>mailto:-------------------- http://www.----------.com/
>>>
>>>Dave Lee wrote:
>>>
>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>coil.
>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>starter, or thereabouts down there.
>>>>
>>>>Any ideas?
>>>
>>
>>
#32
Guest
Posts: n/a
Re: YJ No Spark
Then tell us all what a reluctance head pickup is, because that is
exactly what the CPS is.. :)
Jerry
bllsht wrote:
> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>
>
>>Nope, the CPS doesn't have any current flowing through it unless the
>>engine is running... and then that current is self-generated. :)
>
>
> The crank sensor operates on voltage that is supplied by the PCM anytime the key
> is on, running or not, and does not generate current.
>
>
>
>
>>Jerry
>>
>>Dave Lee wrote:
>>
>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>Would juice through the ignition wires overnight hasten its demise??
>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>news:420911CF.57916359@***.net...
>>>
>>>
>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>Sensor:
>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>> God Bless America, ßill O|||||||O
>>>>mailto:-------------------- http://www.----------.com/
>>>>
>>>>Dave Lee wrote:
>>>>
>>>>
>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>coil.
>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>starter, or thereabouts down there.
>>>>>
>>>>>Any ideas?
>>>>
>>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
exactly what the CPS is.. :)
Jerry
bllsht wrote:
> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>
>
>>Nope, the CPS doesn't have any current flowing through it unless the
>>engine is running... and then that current is self-generated. :)
>
>
> The crank sensor operates on voltage that is supplied by the PCM anytime the key
> is on, running or not, and does not generate current.
>
>
>
>
>>Jerry
>>
>>Dave Lee wrote:
>>
>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>Would juice through the ignition wires overnight hasten its demise??
>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>news:420911CF.57916359@***.net...
>>>
>>>
>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>Sensor:
>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>> God Bless America, ßill O|||||||O
>>>>mailto:-------------------- http://www.----------.com/
>>>>
>>>>Dave Lee wrote:
>>>>
>>>>
>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>coil.
>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>starter, or thereabouts down there.
>>>>>
>>>>>Any ideas?
>>>>
>>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
#33
Guest
Posts: n/a
Re: YJ No Spark
Then tell us all what a reluctance head pickup is, because that is
exactly what the CPS is.. :)
Jerry
bllsht wrote:
> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>
>
>>Nope, the CPS doesn't have any current flowing through it unless the
>>engine is running... and then that current is self-generated. :)
>
>
> The crank sensor operates on voltage that is supplied by the PCM anytime the key
> is on, running or not, and does not generate current.
>
>
>
>
>>Jerry
>>
>>Dave Lee wrote:
>>
>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>Would juice through the ignition wires overnight hasten its demise??
>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>news:420911CF.57916359@***.net...
>>>
>>>
>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>Sensor:
>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>> God Bless America, ßill O|||||||O
>>>>mailto:-------------------- http://www.----------.com/
>>>>
>>>>Dave Lee wrote:
>>>>
>>>>
>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>coil.
>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>starter, or thereabouts down there.
>>>>>
>>>>>Any ideas?
>>>>
>>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
exactly what the CPS is.. :)
Jerry
bllsht wrote:
> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>
>
>>Nope, the CPS doesn't have any current flowing through it unless the
>>engine is running... and then that current is self-generated. :)
>
>
> The crank sensor operates on voltage that is supplied by the PCM anytime the key
> is on, running or not, and does not generate current.
>
>
>
>
>>Jerry
>>
>>Dave Lee wrote:
>>
>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>Would juice through the ignition wires overnight hasten its demise??
>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>news:420911CF.57916359@***.net...
>>>
>>>
>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>Sensor:
>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>> God Bless America, ßill O|||||||O
>>>>mailto:-------------------- http://www.----------.com/
>>>>
>>>>Dave Lee wrote:
>>>>
>>>>
>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>coil.
>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>starter, or thereabouts down there.
>>>>>
>>>>>Any ideas?
>>>>
>>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
#34
Guest
Posts: n/a
Re: YJ No Spark
Then tell us all what a reluctance head pickup is, because that is
exactly what the CPS is.. :)
Jerry
bllsht wrote:
> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>
>
>>Nope, the CPS doesn't have any current flowing through it unless the
>>engine is running... and then that current is self-generated. :)
>
>
> The crank sensor operates on voltage that is supplied by the PCM anytime the key
> is on, running or not, and does not generate current.
>
>
>
>
>>Jerry
>>
>>Dave Lee wrote:
>>
>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>Would juice through the ignition wires overnight hasten its demise??
>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>news:420911CF.57916359@***.net...
>>>
>>>
>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>Sensor:
>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>> God Bless America, ßill O|||||||O
>>>>mailto:-------------------- http://www.----------.com/
>>>>
>>>>Dave Lee wrote:
>>>>
>>>>
>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>coil.
>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>starter, or thereabouts down there.
>>>>>
>>>>>Any ideas?
>>>>
>>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
exactly what the CPS is.. :)
Jerry
bllsht wrote:
> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>
>
>>Nope, the CPS doesn't have any current flowing through it unless the
>>engine is running... and then that current is self-generated. :)
>
>
> The crank sensor operates on voltage that is supplied by the PCM anytime the key
> is on, running or not, and does not generate current.
>
>
>
>
>>Jerry
>>
>>Dave Lee wrote:
>>
>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>Would juice through the ignition wires overnight hasten its demise??
>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>news:420911CF.57916359@***.net...
>>>
>>>
>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>Sensor:
>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>> God Bless America, ßill O|||||||O
>>>>mailto:-------------------- http://www.----------.com/
>>>>
>>>>Dave Lee wrote:
>>>>
>>>>
>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>coil.
>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>starter, or thereabouts down there.
>>>>>
>>>>>Any ideas?
>>>>
>>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
#35
Guest
Posts: n/a
Re: YJ No Spark
Hmmm.....
Normally I would say the bad connection sparking down at the starter
would be the power 'not' going to the ignition module via the bypass
when the starter is cranking. The power goes direct to the module when
the key is in run.
Though I didn't think the solenoid had those connections on it at the
starter, I thought those connections were on the relay on the firewall.
They are on most of the 6 bangers anyway....
The other thing that can spark at the starter is the main wire being
loose. This can cause a major amp draw when the starter is turning.
Enough draw that maybe enough isn't left over to turn on electronics.
If the power goes too low, some things just won't turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Dave Lee wrote:
>
> No spark at plug, nor coil. Rotor in place, brand new distributor and
> connected. Funny, after a while I did open the cap up just to double check
> the rotor. You never know. Well, hopefully tomorrow I will attempt the crank
> sensor. Any idea why I see a spark at the starter? My wife hits the ignition
> and 2 out of 3 times I see a quick little spark down there.
> "DougW" <post.replies@invalid.address> wrote in message
> news:HFbOd.7462$Ps.1339@okepread06...
> > Dave Lee did pass the time by typing:
> >> ok people, it's a 95 YJ, 4 cyl., 5 speed.
> >> No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
> >> coil.
> >> No spark. When I had my wife crank the engine I noticed a spark from the
> >> starter, or thereabouts down there.
> >>
> >> Any ideas?
> >
> > Start simple.
> >
> > Spark from the coil? Hold the coil lead by the block and see if
> > it draws a spark when you turn the engine.
> >
> > Double check you put the rotor in there. :)
> > And the camshaft position sensor pickup on the distributor is hooked back
> > up.
> >
> >
> > And the plugs are going to the proper post.
> >
> > --
> > DougW
> >
> >
Normally I would say the bad connection sparking down at the starter
would be the power 'not' going to the ignition module via the bypass
when the starter is cranking. The power goes direct to the module when
the key is in run.
Though I didn't think the solenoid had those connections on it at the
starter, I thought those connections were on the relay on the firewall.
They are on most of the 6 bangers anyway....
The other thing that can spark at the starter is the main wire being
loose. This can cause a major amp draw when the starter is turning.
Enough draw that maybe enough isn't left over to turn on electronics.
If the power goes too low, some things just won't turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Dave Lee wrote:
>
> No spark at plug, nor coil. Rotor in place, brand new distributor and
> connected. Funny, after a while I did open the cap up just to double check
> the rotor. You never know. Well, hopefully tomorrow I will attempt the crank
> sensor. Any idea why I see a spark at the starter? My wife hits the ignition
> and 2 out of 3 times I see a quick little spark down there.
> "DougW" <post.replies@invalid.address> wrote in message
> news:HFbOd.7462$Ps.1339@okepread06...
> > Dave Lee did pass the time by typing:
> >> ok people, it's a 95 YJ, 4 cyl., 5 speed.
> >> No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
> >> coil.
> >> No spark. When I had my wife crank the engine I noticed a spark from the
> >> starter, or thereabouts down there.
> >>
> >> Any ideas?
> >
> > Start simple.
> >
> > Spark from the coil? Hold the coil lead by the block and see if
> > it draws a spark when you turn the engine.
> >
> > Double check you put the rotor in there. :)
> > And the camshaft position sensor pickup on the distributor is hooked back
> > up.
> >
> >
> > And the plugs are going to the proper post.
> >
> > --
> > DougW
> >
> >
#36
Guest
Posts: n/a
Re: YJ No Spark
Hmmm.....
Normally I would say the bad connection sparking down at the starter
would be the power 'not' going to the ignition module via the bypass
when the starter is cranking. The power goes direct to the module when
the key is in run.
Though I didn't think the solenoid had those connections on it at the
starter, I thought those connections were on the relay on the firewall.
They are on most of the 6 bangers anyway....
The other thing that can spark at the starter is the main wire being
loose. This can cause a major amp draw when the starter is turning.
Enough draw that maybe enough isn't left over to turn on electronics.
If the power goes too low, some things just won't turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Dave Lee wrote:
>
> No spark at plug, nor coil. Rotor in place, brand new distributor and
> connected. Funny, after a while I did open the cap up just to double check
> the rotor. You never know. Well, hopefully tomorrow I will attempt the crank
> sensor. Any idea why I see a spark at the starter? My wife hits the ignition
> and 2 out of 3 times I see a quick little spark down there.
> "DougW" <post.replies@invalid.address> wrote in message
> news:HFbOd.7462$Ps.1339@okepread06...
> > Dave Lee did pass the time by typing:
> >> ok people, it's a 95 YJ, 4 cyl., 5 speed.
> >> No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
> >> coil.
> >> No spark. When I had my wife crank the engine I noticed a spark from the
> >> starter, or thereabouts down there.
> >>
> >> Any ideas?
> >
> > Start simple.
> >
> > Spark from the coil? Hold the coil lead by the block and see if
> > it draws a spark when you turn the engine.
> >
> > Double check you put the rotor in there. :)
> > And the camshaft position sensor pickup on the distributor is hooked back
> > up.
> >
> >
> > And the plugs are going to the proper post.
> >
> > --
> > DougW
> >
> >
Normally I would say the bad connection sparking down at the starter
would be the power 'not' going to the ignition module via the bypass
when the starter is cranking. The power goes direct to the module when
the key is in run.
Though I didn't think the solenoid had those connections on it at the
starter, I thought those connections were on the relay on the firewall.
They are on most of the 6 bangers anyway....
The other thing that can spark at the starter is the main wire being
loose. This can cause a major amp draw when the starter is turning.
Enough draw that maybe enough isn't left over to turn on electronics.
If the power goes too low, some things just won't turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Dave Lee wrote:
>
> No spark at plug, nor coil. Rotor in place, brand new distributor and
> connected. Funny, after a while I did open the cap up just to double check
> the rotor. You never know. Well, hopefully tomorrow I will attempt the crank
> sensor. Any idea why I see a spark at the starter? My wife hits the ignition
> and 2 out of 3 times I see a quick little spark down there.
> "DougW" <post.replies@invalid.address> wrote in message
> news:HFbOd.7462$Ps.1339@okepread06...
> > Dave Lee did pass the time by typing:
> >> ok people, it's a 95 YJ, 4 cyl., 5 speed.
> >> No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
> >> coil.
> >> No spark. When I had my wife crank the engine I noticed a spark from the
> >> starter, or thereabouts down there.
> >>
> >> Any ideas?
> >
> > Start simple.
> >
> > Spark from the coil? Hold the coil lead by the block and see if
> > it draws a spark when you turn the engine.
> >
> > Double check you put the rotor in there. :)
> > And the camshaft position sensor pickup on the distributor is hooked back
> > up.
> >
> >
> > And the plugs are going to the proper post.
> >
> > --
> > DougW
> >
> >
#37
Guest
Posts: n/a
Re: YJ No Spark
Hmmm.....
Normally I would say the bad connection sparking down at the starter
would be the power 'not' going to the ignition module via the bypass
when the starter is cranking. The power goes direct to the module when
the key is in run.
Though I didn't think the solenoid had those connections on it at the
starter, I thought those connections were on the relay on the firewall.
They are on most of the 6 bangers anyway....
The other thing that can spark at the starter is the main wire being
loose. This can cause a major amp draw when the starter is turning.
Enough draw that maybe enough isn't left over to turn on electronics.
If the power goes too low, some things just won't turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Dave Lee wrote:
>
> No spark at plug, nor coil. Rotor in place, brand new distributor and
> connected. Funny, after a while I did open the cap up just to double check
> the rotor. You never know. Well, hopefully tomorrow I will attempt the crank
> sensor. Any idea why I see a spark at the starter? My wife hits the ignition
> and 2 out of 3 times I see a quick little spark down there.
> "DougW" <post.replies@invalid.address> wrote in message
> news:HFbOd.7462$Ps.1339@okepread06...
> > Dave Lee did pass the time by typing:
> >> ok people, it's a 95 YJ, 4 cyl., 5 speed.
> >> No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
> >> coil.
> >> No spark. When I had my wife crank the engine I noticed a spark from the
> >> starter, or thereabouts down there.
> >>
> >> Any ideas?
> >
> > Start simple.
> >
> > Spark from the coil? Hold the coil lead by the block and see if
> > it draws a spark when you turn the engine.
> >
> > Double check you put the rotor in there. :)
> > And the camshaft position sensor pickup on the distributor is hooked back
> > up.
> >
> >
> > And the plugs are going to the proper post.
> >
> > --
> > DougW
> >
> >
Normally I would say the bad connection sparking down at the starter
would be the power 'not' going to the ignition module via the bypass
when the starter is cranking. The power goes direct to the module when
the key is in run.
Though I didn't think the solenoid had those connections on it at the
starter, I thought those connections were on the relay on the firewall.
They are on most of the 6 bangers anyway....
The other thing that can spark at the starter is the main wire being
loose. This can cause a major amp draw when the starter is turning.
Enough draw that maybe enough isn't left over to turn on electronics.
If the power goes too low, some things just won't turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Dave Lee wrote:
>
> No spark at plug, nor coil. Rotor in place, brand new distributor and
> connected. Funny, after a while I did open the cap up just to double check
> the rotor. You never know. Well, hopefully tomorrow I will attempt the crank
> sensor. Any idea why I see a spark at the starter? My wife hits the ignition
> and 2 out of 3 times I see a quick little spark down there.
> "DougW" <post.replies@invalid.address> wrote in message
> news:HFbOd.7462$Ps.1339@okepread06...
> > Dave Lee did pass the time by typing:
> >> ok people, it's a 95 YJ, 4 cyl., 5 speed.
> >> No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
> >> coil.
> >> No spark. When I had my wife crank the engine I noticed a spark from the
> >> starter, or thereabouts down there.
> >>
> >> Any ideas?
> >
> > Start simple.
> >
> > Spark from the coil? Hold the coil lead by the block and see if
> > it draws a spark when you turn the engine.
> >
> > Double check you put the rotor in there. :)
> > And the camshaft position sensor pickup on the distributor is hooked back
> > up.
> >
> >
> > And the plugs are going to the proper post.
> >
> > --
> > DougW
> >
> >
#38
Guest
Posts: n/a
Re: YJ No Spark
In message <4AjOd.8965$Tt.2731@fed1read05>, "Jerry Bransford" wrote:
>Then tell us all what a reluctance head pickup is, because that is
>exactly what the CPS is.. :)
Exactly wrong...
The crank sensor used on a 95 YJ is a hall effect device. It's a 3 wire sensor.
The PCM (SBEC) supplies the ground, 8 volts to operate the circuitry in the
sensor, and a 5 volt reference(signal circuit). These voltages are present any
time the key is on.
The sensor alternates between pulling the reference voltage to ground (zero
volts), and releasing (5 volts), depending on whether it's aligned with a "gap"
or a "tooth".
Put a lab scope on the signal circuit and you'll see a 5 volt square wave. No
current is generated by the sensor.
I don't know what you're thinking of but it's not a 95 Jeep.
>
>Jerry
>
>bllsht wrote:
>> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>>
>>
>>>Nope, the CPS doesn't have any current flowing through it unless the
>>>engine is running... and then that current is self-generated. :)
>>
>>
>> The crank sensor operates on voltage that is supplied by the PCM anytime the key
>> is on, running or not, and does not generate current.
>>
>>
>>
>>
>>>Jerry
>>>
>>>Dave Lee wrote:
>>>
>>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>>Would juice through the ignition wires overnight hasten its demise??
>>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>>news:420911CF.57916359@***.net...
>>>>
>>>>
>>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>>Sensor:
>>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>>> God Bless America, ßill O|||||||O
>>>>>mailto:-------------------- http://www.----------.com/
>>>>>
>>>>>Dave Lee wrote:
>>>>>
>>>>>
>>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>>coil.
>>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>>starter, or thereabouts down there.
>>>>>>
>>>>>>Any ideas?
>>>>>
>>>>
>>
>Then tell us all what a reluctance head pickup is, because that is
>exactly what the CPS is.. :)
Exactly wrong...
The crank sensor used on a 95 YJ is a hall effect device. It's a 3 wire sensor.
The PCM (SBEC) supplies the ground, 8 volts to operate the circuitry in the
sensor, and a 5 volt reference(signal circuit). These voltages are present any
time the key is on.
The sensor alternates between pulling the reference voltage to ground (zero
volts), and releasing (5 volts), depending on whether it's aligned with a "gap"
or a "tooth".
Put a lab scope on the signal circuit and you'll see a 5 volt square wave. No
current is generated by the sensor.
I don't know what you're thinking of but it's not a 95 Jeep.
>
>Jerry
>
>bllsht wrote:
>> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>>
>>
>>>Nope, the CPS doesn't have any current flowing through it unless the
>>>engine is running... and then that current is self-generated. :)
>>
>>
>> The crank sensor operates on voltage that is supplied by the PCM anytime the key
>> is on, running or not, and does not generate current.
>>
>>
>>
>>
>>>Jerry
>>>
>>>Dave Lee wrote:
>>>
>>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>>Would juice through the ignition wires overnight hasten its demise??
>>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>>news:420911CF.57916359@***.net...
>>>>
>>>>
>>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>>Sensor:
>>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>>> God Bless America, ßill O|||||||O
>>>>>mailto:-------------------- http://www.----------.com/
>>>>>
>>>>>Dave Lee wrote:
>>>>>
>>>>>
>>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>>coil.
>>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>>starter, or thereabouts down there.
>>>>>>
>>>>>>Any ideas?
>>>>>
>>>>
>>
#39
Guest
Posts: n/a
Re: YJ No Spark
In message <4AjOd.8965$Tt.2731@fed1read05>, "Jerry Bransford" wrote:
>Then tell us all what a reluctance head pickup is, because that is
>exactly what the CPS is.. :)
Exactly wrong...
The crank sensor used on a 95 YJ is a hall effect device. It's a 3 wire sensor.
The PCM (SBEC) supplies the ground, 8 volts to operate the circuitry in the
sensor, and a 5 volt reference(signal circuit). These voltages are present any
time the key is on.
The sensor alternates between pulling the reference voltage to ground (zero
volts), and releasing (5 volts), depending on whether it's aligned with a "gap"
or a "tooth".
Put a lab scope on the signal circuit and you'll see a 5 volt square wave. No
current is generated by the sensor.
I don't know what you're thinking of but it's not a 95 Jeep.
>
>Jerry
>
>bllsht wrote:
>> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>>
>>
>>>Nope, the CPS doesn't have any current flowing through it unless the
>>>engine is running... and then that current is self-generated. :)
>>
>>
>> The crank sensor operates on voltage that is supplied by the PCM anytime the key
>> is on, running or not, and does not generate current.
>>
>>
>>
>>
>>>Jerry
>>>
>>>Dave Lee wrote:
>>>
>>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>>Would juice through the ignition wires overnight hasten its demise??
>>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>>news:420911CF.57916359@***.net...
>>>>
>>>>
>>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>>Sensor:
>>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>>> God Bless America, ßill O|||||||O
>>>>>mailto:-------------------- http://www.----------.com/
>>>>>
>>>>>Dave Lee wrote:
>>>>>
>>>>>
>>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>>coil.
>>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>>starter, or thereabouts down there.
>>>>>>
>>>>>>Any ideas?
>>>>>
>>>>
>>
>Then tell us all what a reluctance head pickup is, because that is
>exactly what the CPS is.. :)
Exactly wrong...
The crank sensor used on a 95 YJ is a hall effect device. It's a 3 wire sensor.
The PCM (SBEC) supplies the ground, 8 volts to operate the circuitry in the
sensor, and a 5 volt reference(signal circuit). These voltages are present any
time the key is on.
The sensor alternates between pulling the reference voltage to ground (zero
volts), and releasing (5 volts), depending on whether it's aligned with a "gap"
or a "tooth".
Put a lab scope on the signal circuit and you'll see a 5 volt square wave. No
current is generated by the sensor.
I don't know what you're thinking of but it's not a 95 Jeep.
>
>Jerry
>
>bllsht wrote:
>> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>>
>>
>>>Nope, the CPS doesn't have any current flowing through it unless the
>>>engine is running... and then that current is self-generated. :)
>>
>>
>> The crank sensor operates on voltage that is supplied by the PCM anytime the key
>> is on, running or not, and does not generate current.
>>
>>
>>
>>
>>>Jerry
>>>
>>>Dave Lee wrote:
>>>
>>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>>Would juice through the ignition wires overnight hasten its demise??
>>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>>news:420911CF.57916359@***.net...
>>>>
>>>>
>>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>>Sensor:
>>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>>> God Bless America, ßill O|||||||O
>>>>>mailto:-------------------- http://www.----------.com/
>>>>>
>>>>>Dave Lee wrote:
>>>>>
>>>>>
>>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>>coil.
>>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>>starter, or thereabouts down there.
>>>>>>
>>>>>>Any ideas?
>>>>>
>>>>
>>
#40
Guest
Posts: n/a
Re: YJ No Spark
In message <4AjOd.8965$Tt.2731@fed1read05>, "Jerry Bransford" wrote:
>Then tell us all what a reluctance head pickup is, because that is
>exactly what the CPS is.. :)
Exactly wrong...
The crank sensor used on a 95 YJ is a hall effect device. It's a 3 wire sensor.
The PCM (SBEC) supplies the ground, 8 volts to operate the circuitry in the
sensor, and a 5 volt reference(signal circuit). These voltages are present any
time the key is on.
The sensor alternates between pulling the reference voltage to ground (zero
volts), and releasing (5 volts), depending on whether it's aligned with a "gap"
or a "tooth".
Put a lab scope on the signal circuit and you'll see a 5 volt square wave. No
current is generated by the sensor.
I don't know what you're thinking of but it's not a 95 Jeep.
>
>Jerry
>
>bllsht wrote:
>> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>>
>>
>>>Nope, the CPS doesn't have any current flowing through it unless the
>>>engine is running... and then that current is self-generated. :)
>>
>>
>> The crank sensor operates on voltage that is supplied by the PCM anytime the key
>> is on, running or not, and does not generate current.
>>
>>
>>
>>
>>>Jerry
>>>
>>>Dave Lee wrote:
>>>
>>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>>Would juice through the ignition wires overnight hasten its demise??
>>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>>news:420911CF.57916359@***.net...
>>>>
>>>>
>>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>>Sensor:
>>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>>> God Bless America, ßill O|||||||O
>>>>>mailto:-------------------- http://www.----------.com/
>>>>>
>>>>>Dave Lee wrote:
>>>>>
>>>>>
>>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>>coil.
>>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>>starter, or thereabouts down there.
>>>>>>
>>>>>>Any ideas?
>>>>>
>>>>
>>
>Then tell us all what a reluctance head pickup is, because that is
>exactly what the CPS is.. :)
Exactly wrong...
The crank sensor used on a 95 YJ is a hall effect device. It's a 3 wire sensor.
The PCM (SBEC) supplies the ground, 8 volts to operate the circuitry in the
sensor, and a 5 volt reference(signal circuit). These voltages are present any
time the key is on.
The sensor alternates between pulling the reference voltage to ground (zero
volts), and releasing (5 volts), depending on whether it's aligned with a "gap"
or a "tooth".
Put a lab scope on the signal circuit and you'll see a 5 volt square wave. No
current is generated by the sensor.
I don't know what you're thinking of but it's not a 95 Jeep.
>
>Jerry
>
>bllsht wrote:
>> In message <Zt9Od.8377$Tt.943@fed1read05>, "Jerry Bransford" wrote:
>>
>>
>>>Nope, the CPS doesn't have any current flowing through it unless the
>>>engine is running... and then that current is self-generated. :)
>>
>>
>> The crank sensor operates on voltage that is supplied by the PCM anytime the key
>> is on, running or not, and does not generate current.
>>
>>
>>
>>
>>>Jerry
>>>
>>>Dave Lee wrote:
>>>
>>>>Interesting. Now, I was having trouble before it died, and one morning I
>>>>went to the jeep and found the key in the on position, heater fan blowing.
>>>>Would juice through the ignition wires overnight hasten its demise??
>>>>"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
>>>>news:420911CF.57916359@***.net...
>>>>
>>>>
>>>>> Ninety nine percent of the time that'll be the Crankcase Position
>>>>>Sensor:
>>>>>http://www.off-road.com/jeep/cheroke...tdcsensor.html
>>>>> God Bless America, ßill O|||||||O
>>>>>mailto:-------------------- http://www.----------.com/
>>>>>
>>>>>Dave Lee wrote:
>>>>>
>>>>>
>>>>>>ok people, it's a 95 YJ, 4 cyl., 5 speed.
>>>>>>No spark. I replaced the distributor, the cap & rotor, wires, plugs, and
>>>>>>coil.
>>>>>>No spark. When I had my wife crank the engine I noticed a spark from the
>>>>>>starter, or thereabouts down there.
>>>>>>
>>>>>>Any ideas?
>>>>>
>>>>
>>