Odd problem with 98 TJ
 

Hi,

I have a 98TJ 4.0L with 5 speed. 97,000 miles

I have an intermittant problem the engine. It only happens on occasion (maybe
once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
will sudenly begin to stutter, and keeping the foot in the gas will just drop
the revs faster. I just have to press in the clutch and coast to the side of
the road. Once off the road, it will idle smooth as silk, no danger of
stalling, and if I sit there idleing for just a minute or two I can continue
with no problem.

I had a similar problem a couple of years ago and finally tracked it down to a
bad Crank Position sensor. Since this problem was so similar, I went ahead and
put a new CPS in but the problem still remains. I thought it might be bad gas,
but several tanks from differant locations and a couple of bottles of fuel
system cleaner have not fixed it. Although I would think that bad gas or a
clogged filter would give a more consistant, and sustained symptom. Any other
ideas??

Thanks for your help.

Kelly
98TJ
2" suspension
1" body
truetrak in dana 35
32" Super Swampers

Re: Odd problem with 98 TJ
 

Maybe the cam position sensor?

Kelly wrote:
> Hi,
>
> I have a 98TJ 4.0L with 5 speed. 97,000 miles
>
> I have an intermittant problem the engine. It only happens on occasion (maybe
> once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
> will sudenly begin to stutter, and keeping the foot in the gas will just drop
> the revs faster. I just have to press in the clutch and coast to the side of
> the road. Once off the road, it will idle smooth as silk, no danger of
> stalling, and if I sit there idleing for just a minute or two I can continue
> with no problem.
>
> I had a similar problem a couple of years ago and finally tracked it down to a
> bad Crank Position sensor. Since this problem was so similar, I went ahead and
> put a new CPS in but the problem still remains. I thought it might be bad gas,
> but several tanks from differant locations and a couple of bottles of fuel
> system cleaner have not fixed it. Although I would think that bad gas or a
> clogged filter would give a more consistant, and sustained symptom. Any other
> ideas??
>
> Thanks for your help.
>
> Kelly
> 98TJ
> 2" suspension
> 1" body
> truetrak in dana 35
> 32" Super Swampers
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/

Re: Odd problem with 98 TJ
 

Maybe the cam position sensor?

Kelly wrote:
> Hi,
>
> I have a 98TJ 4.0L with 5 speed. 97,000 miles
>
> I have an intermittant problem the engine. It only happens on occasion (maybe
> once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
> will sudenly begin to stutter, and keeping the foot in the gas will just drop
> the revs faster. I just have to press in the clutch and coast to the side of
> the road. Once off the road, it will idle smooth as silk, no danger of
> stalling, and if I sit there idleing for just a minute or two I can continue
> with no problem.
>
> I had a similar problem a couple of years ago and finally tracked it down to a
> bad Crank Position sensor. Since this problem was so similar, I went ahead and
> put a new CPS in but the problem still remains. I thought it might be bad gas,
> but several tanks from differant locations and a couple of bottles of fuel
> system cleaner have not fixed it. Although I would think that bad gas or a
> clogged filter would give a more consistant, and sustained symptom. Any other
> ideas??
>
> Thanks for your help.
>
> Kelly
> 98TJ
> 2" suspension
> 1" body
> truetrak in dana 35
> 32" Super Swampers
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/

Re: Odd problem with 98 TJ
 

Maybe the cam position sensor?

Kelly wrote:
> Hi,
>
> I have a 98TJ 4.0L with 5 speed. 97,000 miles
>
> I have an intermittant problem the engine. It only happens on occasion (maybe
> once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
> will sudenly begin to stutter, and keeping the foot in the gas will just drop
> the revs faster. I just have to press in the clutch and coast to the side of
> the road. Once off the road, it will idle smooth as silk, no danger of
> stalling, and if I sit there idleing for just a minute or two I can continue
> with no problem.
>
> I had a similar problem a couple of years ago and finally tracked it down to a
> bad Crank Position sensor. Since this problem was so similar, I went ahead and
> put a new CPS in but the problem still remains. I thought it might be bad gas,
> but several tanks from differant locations and a couple of bottles of fuel
> system cleaner have not fixed it. Although I would think that bad gas or a
> clogged filter would give a more consistant, and sustained symptom. Any other
> ideas??
>
> Thanks for your help.
>
> Kelly
> 98TJ
> 2" suspension
> 1" body
> truetrak in dana 35
> 32" Super Swampers
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/

Re: Odd problem with 98 TJ
 

Hi Jerry, That's what i thoought at first, so as i said, that was the first
thing I replaced. I have a spanking new CPS in there, but the problem still
persists. I did save the old one so at least i have a spare now.

Regards, Kelly


In article <qMs9f.16302$MN6.11681@fed1read04>, Jerry Bransford says...
>
>Maybe the cam position sensor?
>
>Kelly wrote:
>> Hi,
>>
>> I have a 98TJ 4.0L with 5 speed. 97,000 miles
>>
>>I have an intermittant problem the engine. It only happens on occasion (maybe
>>once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
>> will sudenly begin to stutter, and keeping the foot in the gas will just drop
>> the revs faster. I just have to press in the clutch and coast to the side of
>> the road. Once off the road, it will idle smooth as silk, no danger of
>> stalling, and if I sit there idleing for just a minute or two I can continue
>> with no problem.
>>
>>I had a similar problem a couple of years ago and finally tracked it down to a
>>bad Crank Position sensor. Since this problem was so similar, I went ahead and
>>put a new CPS in but the problem still remains. I thought it might be bad gas,
>> but several tanks from differant locations and a couple of bottles of fuel
>> system cleaner have not fixed it. Although I would think that bad gas or a
>>clogged filter would give a more consistant, and sustained symptom. Any other
>> ideas??
>>
>> Thanks for your help.
>>
>> Kelly
>> 98TJ
>> 2" suspension
>> 1" body
>> truetrak in dana 35
>> 32" Super Swampers
>>
>

Re: Odd problem with 98 TJ
 

Hi Jerry, That's what i thoought at first, so as i said, that was the first
thing I replaced. I have a spanking new CPS in there, but the problem still
persists. I did save the old one so at least i have a spare now.

Regards, Kelly


In article <qMs9f.16302$MN6.11681@fed1read04>, Jerry Bransford says...
>
>Maybe the cam position sensor?
>
>Kelly wrote:
>> Hi,
>>
>> I have a 98TJ 4.0L with 5 speed. 97,000 miles
>>
>>I have an intermittant problem the engine. It only happens on occasion (maybe
>>once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
>> will sudenly begin to stutter, and keeping the foot in the gas will just drop
>> the revs faster. I just have to press in the clutch and coast to the side of
>> the road. Once off the road, it will idle smooth as silk, no danger of
>> stalling, and if I sit there idleing for just a minute or two I can continue
>> with no problem.
>>
>>I had a similar problem a couple of years ago and finally tracked it down to a
>>bad Crank Position sensor. Since this problem was so similar, I went ahead and
>>put a new CPS in but the problem still remains. I thought it might be bad gas,
>> but several tanks from differant locations and a couple of bottles of fuel
>> system cleaner have not fixed it. Although I would think that bad gas or a
>>clogged filter would give a more consistant, and sustained symptom. Any other
>> ideas??
>>
>> Thanks for your help.
>>
>> Kelly
>> 98TJ
>> 2" suspension
>> 1" body
>> truetrak in dana 35
>> 32" Super Swampers
>>
>

Re: Odd problem with 98 TJ
 

Hi Jerry, That's what i thoought at first, so as i said, that was the first
thing I replaced. I have a spanking new CPS in there, but the problem still
persists. I did save the old one so at least i have a spare now.

Regards, Kelly


In article <qMs9f.16302$MN6.11681@fed1read04>, Jerry Bransford says...
>
>Maybe the cam position sensor?
>
>Kelly wrote:
>> Hi,
>>
>> I have a 98TJ 4.0L with 5 speed. 97,000 miles
>>
>>I have an intermittant problem the engine. It only happens on occasion (maybe
>>once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
>> will sudenly begin to stutter, and keeping the foot in the gas will just drop
>> the revs faster. I just have to press in the clutch and coast to the side of
>> the road. Once off the road, it will idle smooth as silk, no danger of
>> stalling, and if I sit there idleing for just a minute or two I can continue
>> with no problem.
>>
>>I had a similar problem a couple of years ago and finally tracked it down to a
>>bad Crank Position sensor. Since this problem was so similar, I went ahead and
>>put a new CPS in but the problem still remains. I thought it might be bad gas,
>> but several tanks from differant locations and a couple of bottles of fuel
>> system cleaner have not fixed it. Although I would think that bad gas or a
>>clogged filter would give a more consistant, and sustained symptom. Any other
>> ideas??
>>
>> Thanks for your help.
>>
>> Kelly
>> 98TJ
>> 2" suspension
>> 1" body
>> truetrak in dana 35
>> 32" Super Swampers
>>
>

Re: Odd problem with 98 TJ
 

Umm, you do know there are two 'CPS's right?

One is under the distributor and is called the Cam Position Sensor, the
other is on the driver's side bell housing and is called the Crank
Position Sensor.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)

Kelly wrote:
>
> Hi Jerry, That's what i thoought at first, so as i said, that was the first
> thing I replaced. I have a spanking new CPS in there, but the problem still
> persists. I did save the old one so at least i have a spare now.
>
> Regards, Kelly
>
> In article <qMs9f.16302$MN6.11681@fed1read04>, Jerry Bransford says...
> >
> >Maybe the cam position sensor?
> >
> >Kelly wrote:
> >> Hi,
> >>
> >> I have a 98TJ 4.0L with 5 speed. 97,000 miles
> >>
> >>I have an intermittant problem the engine. It only happens on occasion (maybe
> >>once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
> >> will sudenly begin to stutter, and keeping the foot in the gas will just drop
> >> the revs faster. I just have to press in the clutch and coast to the side of
> >> the road. Once off the road, it will idle smooth as silk, no danger of
> >> stalling, and if I sit there idleing for just a minute or two I can continue
> >> with no problem.
> >>
> >>I had a similar problem a couple of years ago and finally tracked it down to a
> >>bad Crank Position sensor. Since this problem was so similar, I went ahead and
> >>put a new CPS in but the problem still remains. I thought it might be bad gas,
> >> but several tanks from differant locations and a couple of bottles of fuel
> >> system cleaner have not fixed it. Although I would think that bad gas or a
> >>clogged filter would give a more consistant, and sustained symptom. Any other
> >> ideas??
> >>
> >> Thanks for your help.
> >>
> >> Kelly
> >> 98TJ
> >> 2" suspension
> >> 1" body
> >> truetrak in dana 35
> >> 32" Super Swampers
> >>
> >

Re: Odd problem with 98 TJ
 

Umm, you do know there are two 'CPS's right?

One is under the distributor and is called the Cam Position Sensor, the
other is on the driver's side bell housing and is called the Crank
Position Sensor.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)

Kelly wrote:
>
> Hi Jerry, That's what i thoought at first, so as i said, that was the first
> thing I replaced. I have a spanking new CPS in there, but the problem still
> persists. I did save the old one so at least i have a spare now.
>
> Regards, Kelly
>
> In article <qMs9f.16302$MN6.11681@fed1read04>, Jerry Bransford says...
> >
> >Maybe the cam position sensor?
> >
> >Kelly wrote:
> >> Hi,
> >>
> >> I have a 98TJ 4.0L with 5 speed. 97,000 miles
> >>
> >>I have an intermittant problem the engine. It only happens on occasion (maybe
> >>once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
> >> will sudenly begin to stutter, and keeping the foot in the gas will just drop
> >> the revs faster. I just have to press in the clutch and coast to the side of
> >> the road. Once off the road, it will idle smooth as silk, no danger of
> >> stalling, and if I sit there idleing for just a minute or two I can continue
> >> with no problem.
> >>
> >>I had a similar problem a couple of years ago and finally tracked it down to a
> >>bad Crank Position sensor. Since this problem was so similar, I went ahead and
> >>put a new CPS in but the problem still remains. I thought it might be bad gas,
> >> but several tanks from differant locations and a couple of bottles of fuel
> >> system cleaner have not fixed it. Although I would think that bad gas or a
> >>clogged filter would give a more consistant, and sustained symptom. Any other
> >> ideas??
> >>
> >> Thanks for your help.
> >>
> >> Kelly
> >> 98TJ
> >> 2" suspension
> >> 1" body
> >> truetrak in dana 35
> >> 32" Super Swampers
> >>
> >

Re: Odd problem with 98 TJ
 

Umm, you do know there are two 'CPS's right?

One is under the distributor and is called the Cam Position Sensor, the
other is on the driver's side bell housing and is called the Crank
Position Sensor.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)

Kelly wrote:
>
> Hi Jerry, That's what i thoought at first, so as i said, that was the first
> thing I replaced. I have a spanking new CPS in there, but the problem still
> persists. I did save the old one so at least i have a spare now.
>
> Regards, Kelly
>
> In article <qMs9f.16302$MN6.11681@fed1read04>, Jerry Bransford says...
> >
> >Maybe the cam position sensor?
> >
> >Kelly wrote:
> >> Hi,
> >>
> >> I have a 98TJ 4.0L with 5 speed. 97,000 miles
> >>
> >>I have an intermittant problem the engine. It only happens on occasion (maybe
> >>once a week) and ONLY after 30+ minutes of sustained highway speeds. The engine
> >> will sudenly begin to stutter, and keeping the foot in the gas will just drop
> >> the revs faster. I just have to press in the clutch and coast to the side of
> >> the road. Once off the road, it will idle smooth as silk, no danger of
> >> stalling, and if I sit there idleing for just a minute or two I can continue
> >> with no problem.
> >>
> >>I had a similar problem a couple of years ago and finally tracked it down to a
> >>bad Crank Position sensor. Since this problem was so similar, I went ahead and
> >>put a new CPS in but the problem still remains. I thought it might be bad gas,
> >> but several tanks from differant locations and a couple of bottles of fuel
> >> system cleaner have not fixed it. Although I would think that bad gas or a
> >>clogged filter would give a more consistant, and sustained symptom. Any other
> >> ideas??
> >>
> >> Thanks for your help.
> >>
> >> Kelly
> >> 98TJ
> >> 2" suspension
> >> 1" body
> >> truetrak in dana 35
> >> 32" Super Swampers
> >>
> >