rough idle 97 TJ
 

Ok so this morning i was tracking down an overheating problem with my
jeep in idle. Turns out the problem was a clogged radiator. Anyways so
I ran the jeep about 30 minutes in idle to assure myself that it
wasn't overheating any more. At that point it was running fine. About
1/2 hour later, I started my Jeep again and it ran really really
rough. It didnt stall, but the RPMs were going up and down in idle. It
was acting really weird. I went to the parts store and bout Seafoam,
and filled up my gas tank, but the problem still persisits.

Re: rough idle 97 TJ
 

i just got a check engine light and code:

24* Throttle position sensor over 4.96V

I tried cleaning the contacts on it to no avail. Now should I clean
out the throttle body or replace the sensor?

Re: rough idle 97 TJ
 

i just got a check engine light and code:

24* Throttle position sensor over 4.96V

I tried cleaning the contacts on it to no avail. Now should I clean
out the throttle body or replace the sensor?

Re: rough idle 97 TJ
 

i just got a check engine light and code:

24* Throttle position sensor over 4.96V

I tried cleaning the contacts on it to no avail. Now should I clean
out the throttle body or replace the sensor?

Re: rough idle 97 TJ
 

i just got a check engine light and code:

24* Throttle position sensor over 4.96V

I tried cleaning the contacts on it to no avail. Now should I clean
out the throttle body or replace the sensor?

Re: rough idle 97 TJ
 

97tjMike wrote:
> i just got a check engine light and code:
>
> 24* Throttle position sensor over 4.96V
>
> I tried cleaning the contacts on it to no avail. Now should I clean
> out the throttle body or replace the sensor?
>

Probably need a TPS. Mine went bad and it wouldn't idle.

Re: rough idle 97 TJ
 

97tjMike wrote:
> i just got a check engine light and code:
>
> 24* Throttle position sensor over 4.96V
>
> I tried cleaning the contacts on it to no avail. Now should I clean
> out the throttle body or replace the sensor?
>

Probably need a TPS. Mine went bad and it wouldn't idle.

Re: rough idle 97 TJ
 

97tjMike wrote:
> i just got a check engine light and code:
>
> 24* Throttle position sensor over 4.96V
>
> I tried cleaning the contacts on it to no avail. Now should I clean
> out the throttle body or replace the sensor?
>

Probably need a TPS. Mine went bad and it wouldn't idle.

Re: rough idle 97 TJ
 

97tjMike wrote:
> i just got a check engine light and code:
>
> 24* Throttle position sensor over 4.96V
>
> I tried cleaning the contacts on it to no avail. Now should I clean
> out the throttle body or replace the sensor?
>

Probably need a TPS. Mine went bad and it wouldn't idle.

Re: rough idle 97 TJ
 

On Jun 2, 2:22 pm, Scott in Baltimore
<sDcOoNtTtS_PuAnMiMtE...@yahoo.com> wrote:
> 97tjMike wrote:
> > i just got a check engine light and code:
>
> > 24* Throttle position sensor over 4.96V
>
> > I tried cleaning the contacts on it to no avail. Now should I clean
> > out the throttle body or replace the sensor?
>
> Probably need a TPS. Mine went bad and it wouldn't idle.

is there a way to test the old one?

Re: rough idle 97 TJ
 

On Jun 2, 2:22 pm, Scott in Baltimore
<sDcOoNtTtS_PuAnMiMtE...@yahoo.com> wrote:
> 97tjMike wrote:
> > i just got a check engine light and code:
>
> > 24* Throttle position sensor over 4.96V
>
> > I tried cleaning the contacts on it to no avail. Now should I clean
> > out the throttle body or replace the sensor?
>
> Probably need a TPS. Mine went bad and it wouldn't idle.

is there a way to test the old one?

Re: rough idle 97 TJ
 

On Jun 2, 2:22 pm, Scott in Baltimore
<sDcOoNtTtS_PuAnMiMtE...@yahoo.com> wrote:
> 97tjMike wrote:
> > i just got a check engine light and code:
>
> > 24* Throttle position sensor over 4.96V
>
> > I tried cleaning the contacts on it to no avail. Now should I clean
> > out the throttle body or replace the sensor?
>
> Probably need a TPS. Mine went bad and it wouldn't idle.

is there a way to test the old one?

Re: rough idle 97 TJ
 

On Jun 2, 2:22 pm, Scott in Baltimore
<sDcOoNtTtS_PuAnMiMtE...@yahoo.com> wrote:
> 97tjMike wrote:
> > i just got a check engine light and code:
>
> > 24* Throttle position sensor over 4.96V
>
> > I tried cleaning the contacts on it to no avail. Now should I clean
> > out the throttle body or replace the sensor?
>
> Probably need a TPS. Mine went bad and it wouldn't idle.

is there a way to test the old one?

Re: rough idle 97 TJ
 

97tjMike wrote:
> On Jun 2, 2:22 pm, Scott in Baltimore
> <sDcOoNtTtS_PuAnMiMtE...@yahoo.com> wrote:
>> 97tjMike wrote:
>>> i just got a check engine light and code:
>>> 24* Throttle position sensor over 4.96V
>>> I tried cleaning the contacts on it to no avail. Now should I clean
>>> out the throttle body or replace the sensor?
>> Probably need a TPS. Mine went bad and it wouldn't idle.
>
> is there a way to test the old one?
>

They are a basic rheostat. You can put a multimeter on them and move
the throttle expecting to see a smooth rise in resistance as you do it.
Mine rises by 1 ohm increments all the way up.

The other way on the older ones at least was to back probe the plug in
and read the voltage with the engine off, AC off and key in the run
position. It should start at .02V and rise to 4.8V.

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!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: rough idle 97 TJ
 

97tjMike wrote:
> On Jun 2, 2:22 pm, Scott in Baltimore
> <sDcOoNtTtS_PuAnMiMtE...@yahoo.com> wrote:
>> 97tjMike wrote:
>>> i just got a check engine light and code:
>>> 24* Throttle position sensor over 4.96V
>>> I tried cleaning the contacts on it to no avail. Now should I clean
>>> out the throttle body or replace the sensor?
>> Probably need a TPS. Mine went bad and it wouldn't idle.
>
> is there a way to test the old one?
>

They are a basic rheostat. You can put a multimeter on them and move
the throttle expecting to see a smooth rise in resistance as you do it.
Mine rises by 1 ohm increments all the way up.

The other way on the older ones at least was to back probe the plug in
and read the voltage with the engine off, AC off and key in the run
position. It should start at .02V and rise to 4.8V.

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!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: rough idle 97 TJ
 

97tjMike wrote:
> On Jun 2, 2:22 pm, Scott in Baltimore
> <sDcOoNtTtS_PuAnMiMtE...@yahoo.com> wrote:
>> 97tjMike wrote:
>>> i just got a check engine light and code:
>>> 24* Throttle position sensor over 4.96V
>>> I tried cleaning the contacts on it to no avail. Now should I clean
>>> out the throttle body or replace the sensor?
>> Probably need a TPS. Mine went bad and it wouldn't idle.
>
> is there a way to test the old one?
>

They are a basic rheostat. You can put a multimeter on them and move
the throttle expecting to see a smooth rise in resistance as you do it.
Mine rises by 1 ohm increments all the way up.

The other way on the older ones at least was to back probe the plug in
and read the voltage with the engine off, AC off and key in the run
position. It should start at .02V and rise to 4.8V.

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!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: rough idle 97 TJ
 

97tjMike wrote:
> On Jun 2, 2:22 pm, Scott in Baltimore
> <sDcOoNtTtS_PuAnMiMtE...@yahoo.com> wrote:
>> 97tjMike wrote:
>>> i just got a check engine light and code:
>>> 24* Throttle position sensor over 4.96V
>>> I tried cleaning the contacts on it to no avail. Now should I clean
>>> out the throttle body or replace the sensor?
>> Probably need a TPS. Mine went bad and it wouldn't idle.
>
> is there a way to test the old one?
>

They are a basic rheostat. You can put a multimeter on them and move
the throttle expecting to see a smooth rise in resistance as you do it.
Mine rises by 1 ohm increments all the way up.

The other way on the older ones at least was to back probe the plug in
and read the voltage with the engine off, AC off and key in the run
position. It should start at .02V and rise to 4.8V.

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!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: rough idle 97 TJ
 

which terminals do i test? there are 3 of them

Re: rough idle 97 TJ
 

which terminals do i test? there are 3 of them

Re: rough idle 97 TJ
 

which terminals do i test? there are 3 of them

Re: rough idle 97 TJ
 

which terminals do i test? there are 3 of them

Re: rough idle 97 TJ
 

97tjMike wrote:
> which terminals do i test? there are 3 of them
>

The center and either of the others. I think they mirror each other for
use in an automatic so one will read .02V and the other will read 4.8V
to the center.

One will read that way anyway and the meter won't hurt anything checking
the other.

Mike

Re: rough idle 97 TJ
 

97tjMike wrote:
> which terminals do i test? there are 3 of them
>

The center and either of the others. I think they mirror each other for
use in an automatic so one will read .02V and the other will read 4.8V
to the center.

One will read that way anyway and the meter won't hurt anything checking
the other.

Mike

Re: rough idle 97 TJ
 

97tjMike wrote:
> which terminals do i test? there are 3 of them
>

The center and either of the others. I think they mirror each other for
use in an automatic so one will read .02V and the other will read 4.8V
to the center.

One will read that way anyway and the meter won't hurt anything checking
the other.

Mike

Re: rough idle 97 TJ
 

97tjMike wrote:
> which terminals do i test? there are 3 of them
>

The center and either of the others. I think they mirror each other for
use in an automatic so one will read .02V and the other will read 4.8V
to the center.

One will read that way anyway and the meter won't hurt anything checking
the other.

Mike

Re: rough idle 97 TJ
 

On Jun 2, 4:02 pm, Mike Romain <roma...@sympatico.ca> wrote:
> 97tjMike wrote:
> > which terminals do i test? there are 3 of them
>
> The center and either of the others. I think they mirror each other for
> use in an automatic so one will read .02V and the other will read 4.8V
> to the center.
>
> One will read that way anyway and the meter won't hurt anything checking
> the other.
>
> Mike

well thanks for your help. i ended up spending the 60 bucks and
replacing the sensor. everythings ok now.

Re: rough idle 97 TJ
 

On Jun 2, 4:02 pm, Mike Romain <roma...@sympatico.ca> wrote:
> 97tjMike wrote:
> > which terminals do i test? there are 3 of them
>
> The center and either of the others. I think they mirror each other for
> use in an automatic so one will read .02V and the other will read 4.8V
> to the center.
>
> One will read that way anyway and the meter won't hurt anything checking
> the other.
>
> Mike

well thanks for your help. i ended up spending the 60 bucks and
replacing the sensor. everythings ok now.

Re: rough idle 97 TJ
 

On Jun 2, 4:02 pm, Mike Romain <roma...@sympatico.ca> wrote:
> 97tjMike wrote:
> > which terminals do i test? there are 3 of them
>
> The center and either of the others. I think they mirror each other for
> use in an automatic so one will read .02V and the other will read 4.8V
> to the center.
>
> One will read that way anyway and the meter won't hurt anything checking
> the other.
>
> Mike

well thanks for your help. i ended up spending the 60 bucks and
replacing the sensor. everythings ok now.

Re: rough idle 97 TJ
 

On Jun 2, 4:02 pm, Mike Romain <roma...@sympatico.ca> wrote:
> 97tjMike wrote:
> > which terminals do i test? there are 3 of them
>
> The center and either of the others. I think they mirror each other for
> use in an automatic so one will read .02V and the other will read 4.8V
> to the center.
>
> One will read that way anyway and the meter won't hurt anything checking
> the other.
>
> Mike

well thanks for your help. i ended up spending the 60 bucks and
replacing the sensor. everythings ok now.