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