97 ZJ JGC - Wont idle cold and now barely when warm!!
 

Greetings,
I have about 81,000 miles or about 135,000 km. And keep it nice and
maintained.

Last fall i had problems , ZJ would not idle when cold, i replaced the
IAC and we were back in business.
I spayed a can of TB cleaner into the TB as well and threw in a can of
injector cleaner in the tank.
It never idled smoother.

Its been running great until this week. Developed the no cold idle
again.
Its wants to idle at about 250-300 instead of its normally robust 500
rpm,
it seems to surge and fall from 225 to just under 500.

It runs fine at speed on the freeway.

I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB
cleaner into the IAC port and wiped it out.
I stuck my finger into the IAC port with a rag as far as I could go
and rotated it to clean.
Is it possible I broke something in the TB when I did that?
I kind of doubt it cuz thats what i did last fall and everything was
fine afterward.

Replaced the TPS , if anything it seemed to idle even lower. ( It was
not a mopar TPS )

Today, just trying the easy stuff replaced the crankshaft position
sensor, still runs bad -- this was more a preventative step ( i.e
hoping ).

I disconnected the TPS while its was idling and all it did was throw a
code (24- low/high tps voltage ),
the motor had no reaction, other than to keep chugging away.
i did plug the tps back in and the code is still there but i figure it
will clear in 4 or 5 starts.

I have not gotten any codes ( other than the self -inflicted 24 )
Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of
doubt it.

All I got left on the TB to replace is the MAP sensor and that puppy
is about 150 clams.
I could throw more injector cleaner in the tank, but i feel that's not
the root problem.
Should i pull the TB?

Any pointers appreciated-- oh ya Is it possible to install a TPS
wrong?
Im not ready to take it to the garage just yet.

Thanks,
James

Re: 97 ZJ JGC - Wont idle cold and now barely when warm!!
 

Today I removed the TB and cleaned it thoroughly, reassembled it and
still had no idle.

iI did check the voltages ( Key on- not running ) on the TPS , oddly
the center terminal ( orange ) read 4.67v and the
terminal to the left of center (BLK) read .01v and right of
center(BRN) seemed to be around 5.0V.

>From my understanding of the shop manual i would think the center
terminal ( TPS output to PCM ) should be low ( <1v) when 'idle'. and 5
when Wide Open.
When my buddy comes over tomorrow I will check the range/sweep of the
TPS . Its a new TPS sensor- but you never know.
, the IAC is 10 months old and the MAP sensor is original. The PCM was
replaced in 2002.

Tomorrow , I am checking the electrics on the TPS/IAC/MAP.
Im still not ready to take it to the garage just yet:-)

Any pointers appreciated,
James

Solutions to Date
Replace TPS
Replace CKPS
Remove and clean throttle body.

Parts to Date on this problem
CrankP Sensor
Throttle Pos Sensor
TB Gasket
12 hours



On Aug 28, 8:49 pm, jamest <jam...@sympatico.ca> wrote:
> Greetings,
> I have about 81,000 miles or about 135,000 km. And keep it nice and
> maintained.
>
> Last fall i had problems , ZJ would not idle when cold, i replaced the
> IAC and we were back in business.
> I spayed a can of TB cleaner into the TB as well and threw in a can of
> injector cleaner in the tank.
> It never idled smoother.
>
> Its been running great until this week. Developed the no cold idle
> again.
> Its wants to idle at about 250-300 instead of its normally robust 500
> rpm,
> it seems to surge and fall from 225 to just under 500.
>
> It runs fine at speed on the freeway.
>
> I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB
> cleaner into the IAC port and wiped it out.
> I stuck my finger into the IAC port with a rag as far as I could go
> and rotated it to clean.
> Is it possible I broke something in the TB when I did that?
> I kind of doubt it cuz thats what i did last fall and everything was
> fine afterward.
>
> Replaced the TPS , if anything it seemed to idle even lower. ( It was
> not a mopar TPS )
>
> Today, just trying the easy stuff replaced the crankshaft position
> sensor, still runs bad -- this was more a preventative step ( i.e
> hoping ).
>
> I disconnected the TPS while its was idling and all it did was throw a
> code (24- low/high tps voltage ),
> the motor had no reaction, other than to keep chugging away.
> i did plug the tps back in and the code is still there but i figure it
> will clear in 4 or 5 starts.
>
> I have not gotten any codes ( other than the self -inflicted 24 )
> Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of
> doubt it.
>
> All I got left on the TB to replace is the MAP sensor and that puppy
> is about 150 clams.
> I could throw more injector cleaner in the tank, but i feel that's not
> the root problem.
> Should i pull the TB?
>
> Any pointers appreciated-- oh ya Is it possible to install a TPS
> wrong?
> Im not ready to take it to the garage just yet.
>
> Thanks,
> James

Re: 97 ZJ JGC - Wont idle cold and now barely when warm!!
 

Today I removed the TB and cleaned it thoroughly, reassembled it and
still had no idle.

iI did check the voltages ( Key on- not running ) on the TPS , oddly
the center terminal ( orange ) read 4.67v and the
terminal to the left of center (BLK) read .01v and right of
center(BRN) seemed to be around 5.0V.

>From my understanding of the shop manual i would think the center
terminal ( TPS output to PCM ) should be low ( <1v) when 'idle'. and 5
when Wide Open.
When my buddy comes over tomorrow I will check the range/sweep of the
TPS . Its a new TPS sensor- but you never know.
, the IAC is 10 months old and the MAP sensor is original. The PCM was
replaced in 2002.

Tomorrow , I am checking the electrics on the TPS/IAC/MAP.
Im still not ready to take it to the garage just yet:-)

Any pointers appreciated,
James

Solutions to Date
Replace TPS
Replace CKPS
Remove and clean throttle body.

Parts to Date on this problem
CrankP Sensor
Throttle Pos Sensor
TB Gasket
12 hours



On Aug 28, 8:49 pm, jamest <jam...@sympatico.ca> wrote:
> Greetings,
> I have about 81,000 miles or about 135,000 km. And keep it nice and
> maintained.
>
> Last fall i had problems , ZJ would not idle when cold, i replaced the
> IAC and we were back in business.
> I spayed a can of TB cleaner into the TB as well and threw in a can of
> injector cleaner in the tank.
> It never idled smoother.
>
> Its been running great until this week. Developed the no cold idle
> again.
> Its wants to idle at about 250-300 instead of its normally robust 500
> rpm,
> it seems to surge and fall from 225 to just under 500.
>
> It runs fine at speed on the freeway.
>
> I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB
> cleaner into the IAC port and wiped it out.
> I stuck my finger into the IAC port with a rag as far as I could go
> and rotated it to clean.
> Is it possible I broke something in the TB when I did that?
> I kind of doubt it cuz thats what i did last fall and everything was
> fine afterward.
>
> Replaced the TPS , if anything it seemed to idle even lower. ( It was
> not a mopar TPS )
>
> Today, just trying the easy stuff replaced the crankshaft position
> sensor, still runs bad -- this was more a preventative step ( i.e
> hoping ).
>
> I disconnected the TPS while its was idling and all it did was throw a
> code (24- low/high tps voltage ),
> the motor had no reaction, other than to keep chugging away.
> i did plug the tps back in and the code is still there but i figure it
> will clear in 4 or 5 starts.
>
> I have not gotten any codes ( other than the self -inflicted 24 )
> Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of
> doubt it.
>
> All I got left on the TB to replace is the MAP sensor and that puppy
> is about 150 clams.
> I could throw more injector cleaner in the tank, but i feel that's not
> the root problem.
> Should i pull the TB?
>
> Any pointers appreciated-- oh ya Is it possible to install a TPS
> wrong?
> Im not ready to take it to the garage just yet.
>
> Thanks,
> James

Re: 97 ZJ JGC - Wont idle cold and now barely when warm!!
 

Today I removed the TB and cleaned it thoroughly, reassembled it and
still had no idle.

iI did check the voltages ( Key on- not running ) on the TPS , oddly
the center terminal ( orange ) read 4.67v and the
terminal to the left of center (BLK) read .01v and right of
center(BRN) seemed to be around 5.0V.

>From my understanding of the shop manual i would think the center
terminal ( TPS output to PCM ) should be low ( <1v) when 'idle'. and 5
when Wide Open.
When my buddy comes over tomorrow I will check the range/sweep of the
TPS . Its a new TPS sensor- but you never know.
, the IAC is 10 months old and the MAP sensor is original. The PCM was
replaced in 2002.

Tomorrow , I am checking the electrics on the TPS/IAC/MAP.
Im still not ready to take it to the garage just yet:-)

Any pointers appreciated,
James

Solutions to Date
Replace TPS
Replace CKPS
Remove and clean throttle body.

Parts to Date on this problem
CrankP Sensor
Throttle Pos Sensor
TB Gasket
12 hours



On Aug 28, 8:49 pm, jamest <jam...@sympatico.ca> wrote:
> Greetings,
> I have about 81,000 miles or about 135,000 km. And keep it nice and
> maintained.
>
> Last fall i had problems , ZJ would not idle when cold, i replaced the
> IAC and we were back in business.
> I spayed a can of TB cleaner into the TB as well and threw in a can of
> injector cleaner in the tank.
> It never idled smoother.
>
> Its been running great until this week. Developed the no cold idle
> again.
> Its wants to idle at about 250-300 instead of its normally robust 500
> rpm,
> it seems to surge and fall from 225 to just under 500.
>
> It runs fine at speed on the freeway.
>
> I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB
> cleaner into the IAC port and wiped it out.
> I stuck my finger into the IAC port with a rag as far as I could go
> and rotated it to clean.
> Is it possible I broke something in the TB when I did that?
> I kind of doubt it cuz thats what i did last fall and everything was
> fine afterward.
>
> Replaced the TPS , if anything it seemed to idle even lower. ( It was
> not a mopar TPS )
>
> Today, just trying the easy stuff replaced the crankshaft position
> sensor, still runs bad -- this was more a preventative step ( i.e
> hoping ).
>
> I disconnected the TPS while its was idling and all it did was throw a
> code (24- low/high tps voltage ),
> the motor had no reaction, other than to keep chugging away.
> i did plug the tps back in and the code is still there but i figure it
> will clear in 4 or 5 starts.
>
> I have not gotten any codes ( other than the self -inflicted 24 )
> Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of
> doubt it.
>
> All I got left on the TB to replace is the MAP sensor and that puppy
> is about 150 clams.
> I could throw more injector cleaner in the tank, but i feel that's not
> the root problem.
> Should i pull the TB?
>
> Any pointers appreciated-- oh ya Is it possible to install a TPS
> wrong?
> Im not ready to take it to the garage just yet.
>
> Thanks,
> James

Re: 97 ZJ JGC - Wont idle cold and now barely when warm!!
 

Today I removed the TB and cleaned it thoroughly, reassembled it and
still had no idle.

iI did check the voltages ( Key on- not running ) on the TPS , oddly
the center terminal ( orange ) read 4.67v and the
terminal to the left of center (BLK) read .01v and right of
center(BRN) seemed to be around 5.0V.

>From my understanding of the shop manual i would think the center
terminal ( TPS output to PCM ) should be low ( <1v) when 'idle'. and 5
when Wide Open.
When my buddy comes over tomorrow I will check the range/sweep of the
TPS . Its a new TPS sensor- but you never know.
, the IAC is 10 months old and the MAP sensor is original. The PCM was
replaced in 2002.

Tomorrow , I am checking the electrics on the TPS/IAC/MAP.
Im still not ready to take it to the garage just yet:-)

Any pointers appreciated,
James

Solutions to Date
Replace TPS
Replace CKPS
Remove and clean throttle body.

Parts to Date on this problem
CrankP Sensor
Throttle Pos Sensor
TB Gasket
12 hours



On Aug 28, 8:49 pm, jamest <jam...@sympatico.ca> wrote:
> Greetings,
> I have about 81,000 miles or about 135,000 km. And keep it nice and
> maintained.
>
> Last fall i had problems , ZJ would not idle when cold, i replaced the
> IAC and we were back in business.
> I spayed a can of TB cleaner into the TB as well and threw in a can of
> injector cleaner in the tank.
> It never idled smoother.
>
> Its been running great until this week. Developed the no cold idle
> again.
> Its wants to idle at about 250-300 instead of its normally robust 500
> rpm,
> it seems to surge and fall from 225 to just under 500.
>
> It runs fine at speed on the freeway.
>
> I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB
> cleaner into the IAC port and wiped it out.
> I stuck my finger into the IAC port with a rag as far as I could go
> and rotated it to clean.
> Is it possible I broke something in the TB when I did that?
> I kind of doubt it cuz thats what i did last fall and everything was
> fine afterward.
>
> Replaced the TPS , if anything it seemed to idle even lower. ( It was
> not a mopar TPS )
>
> Today, just trying the easy stuff replaced the crankshaft position
> sensor, still runs bad -- this was more a preventative step ( i.e
> hoping ).
>
> I disconnected the TPS while its was idling and all it did was throw a
> code (24- low/high tps voltage ),
> the motor had no reaction, other than to keep chugging away.
> i did plug the tps back in and the code is still there but i figure it
> will clear in 4 or 5 starts.
>
> I have not gotten any codes ( other than the self -inflicted 24 )
> Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of
> doubt it.
>
> All I got left on the TB to replace is the MAP sensor and that puppy
> is about 150 clams.
> I could throw more injector cleaner in the tank, but i feel that's not
> the root problem.
> Should i pull the TB?
>
> Any pointers appreciated-- oh ya Is it possible to install a TPS
> wrong?
> Im not ready to take it to the garage just yet.
>
> Thanks,
> James

Re: 97 ZJ JGC - Wont idle cold and now barely when warm!!
 

In todays episode...

Checked the voltages on the TPS-- its cooked. Put back on my MOPAR one
and my MOPAR IAC--
The TPS is now working right but still no cold idle-- but once warmed
a little is fine.
Todays lesson is no more Chinese parts.

I am getting high voltages out of the MAP sensor, so I ordered that --
went to the dealer.
Also I only get 7KOhm from the intake manifold temp sensor which is
kind of low-- so I also ordered that.

I will install those tomorrow. If that fails then its onto the
coolant temp sensor, the O2 sensor.

jt


On Aug 29, 8:52 pm, jamest <jam...@sympatico.ca> wrote:
> Today I removed the TB and cleaned it thoroughly, reassembled it and
> still had no idle.
>
> iI did check the voltages ( Key on- not running ) on the TPS , oddly
> the center terminal ( orange ) read 4.67v and the
> terminal to the left of center (BLK) read .01v and right of
> center(BRN) seemed to be around 5.0V.
>
> >From my understanding of the shop manual i would think the center
>
> terminal ( TPS output to PCM ) should be low ( <1v) when 'idle'. and 5
> when Wide Open.
> When my buddy comes over tomorrow I will check the range/sweep of the
> TPS . Its a new TPS sensor- but you never know.
> , the IAC is 10 months old and the MAP sensor is original. The PCM was
> replaced in 2002.
>
> Tomorrow , I am checking the electrics on the TPS/IAC/MAP.
> Im still not ready to take it to the garage just yet:-)
>
> Any pointers appreciated,
> James
>
> Solutions to Date
> Replace TPS
> Replace CKPS
> Remove and clean throttle body.
>
> Parts to Date on this problem
> CrankP Sensor
> Throttle Pos Sensor
> TB Gasket
> 12 hours
>
> On Aug 28, 8:49 pm, jamest <jam...@sympatico.ca> wrote:
>
> > Greetings,
> > I have about 81,000 miles or about 135,000 km. And keep it nice and
> > maintained.
>
> > Last fall i had problems , ZJ would not idle when cold, i replaced the
> > IAC and we were back in business.
> > I spayed a can of TB cleaner into the TB as well and threw in a can of
> > injector cleaner in the tank.
> > It never idled smoother.
>
> > Its been running great until this week. Developed the no cold idle
> > again.
> > Its wants to idle at about 250-300 instead of its normally robust 500
> > rpm,
> > it seems to surge and fall from 225 to just under 500.
>
> > It runs fine at speed on the freeway.
>
> > I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB
> > cleaner into the IAC port and wiped it out.
> > I stuck my finger into the IAC port with a rag as far as I could go
> > and rotated it to clean.
> > Is it possible I broke something in the TB when I did that?
> > I kind of doubt it cuz thats what i did last fall and everything was
> > fine afterward.
>
> > Replaced the TPS , if anything it seemed to idle even lower. ( It was
> > not a mopar TPS )
>
> > Today, just trying the easy stuff replaced the crankshaft position
> > sensor, still runs bad -- this was more a preventative step ( i.e
> > hoping ).
>
> > I disconnected the TPS while its was idling and all it did was throw a
> > code (24- low/high tps voltage ),
> > the motor had no reaction, other than to keep chugging away.
> > i did plug the tps back in and the code is still there but i figure it
> > will clear in 4 or 5 starts.
>
> > I have not gotten any codes ( other than the self -inflicted 24 )
> > Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of
> > doubt it.
>
> > All I got left on the TB to replace is the MAP sensor and that puppy
> > is about 150 clams.
> > I could throw more injector cleaner in the tank, but i feel that's not
> > the root problem.
> > Should i pull the TB?
>
> > Any pointers appreciated-- oh ya Is it possible to install a TPS
> > wrong?
> > Im not ready to take it to the garage just yet.
>
> > Thanks,
> > James

Re: 97 ZJ JGC - Wont idle cold and now barely when warm!!
 

In todays episode...

Checked the voltages on the TPS-- its cooked. Put back on my MOPAR one
and my MOPAR IAC--
The TPS is now working right but still no cold idle-- but once warmed
a little is fine.
Todays lesson is no more Chinese parts.

I am getting high voltages out of the MAP sensor, so I ordered that --
went to the dealer.
Also I only get 7KOhm from the intake manifold temp sensor which is
kind of low-- so I also ordered that.

I will install those tomorrow. If that fails then its onto the
coolant temp sensor, the O2 sensor.

jt


On Aug 29, 8:52 pm, jamest <jam...@sympatico.ca> wrote:
> Today I removed the TB and cleaned it thoroughly, reassembled it and
> still had no idle.
>
> iI did check the voltages ( Key on- not running ) on the TPS , oddly
> the center terminal ( orange ) read 4.67v and the
> terminal to the left of center (BLK) read .01v and right of
> center(BRN) seemed to be around 5.0V.
>
> >From my understanding of the shop manual i would think the center
>
> terminal ( TPS output to PCM ) should be low ( <1v) when 'idle'. and 5
> when Wide Open.
> When my buddy comes over tomorrow I will check the range/sweep of the
> TPS . Its a new TPS sensor- but you never know.
> , the IAC is 10 months old and the MAP sensor is original. The PCM was
> replaced in 2002.
>
> Tomorrow , I am checking the electrics on the TPS/IAC/MAP.
> Im still not ready to take it to the garage just yet:-)
>
> Any pointers appreciated,
> James
>
> Solutions to Date
> Replace TPS
> Replace CKPS
> Remove and clean throttle body.
>
> Parts to Date on this problem
> CrankP Sensor
> Throttle Pos Sensor
> TB Gasket
> 12 hours
>
> On Aug 28, 8:49 pm, jamest <jam...@sympatico.ca> wrote:
>
> > Greetings,
> > I have about 81,000 miles or about 135,000 km. And keep it nice and
> > maintained.
>
> > Last fall i had problems , ZJ would not idle when cold, i replaced the
> > IAC and we were back in business.
> > I spayed a can of TB cleaner into the TB as well and threw in a can of
> > injector cleaner in the tank.
> > It never idled smoother.
>
> > Its been running great until this week. Developed the no cold idle
> > again.
> > Its wants to idle at about 250-300 instead of its normally robust 500
> > rpm,
> > it seems to surge and fall from 225 to just under 500.
>
> > It runs fine at speed on the freeway.
>
> > I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB
> > cleaner into the IAC port and wiped it out.
> > I stuck my finger into the IAC port with a rag as far as I could go
> > and rotated it to clean.
> > Is it possible I broke something in the TB when I did that?
> > I kind of doubt it cuz thats what i did last fall and everything was
> > fine afterward.
>
> > Replaced the TPS , if anything it seemed to idle even lower. ( It was
> > not a mopar TPS )
>
> > Today, just trying the easy stuff replaced the crankshaft position
> > sensor, still runs bad -- this was more a preventative step ( i.e
> > hoping ).
>
> > I disconnected the TPS while its was idling and all it did was throw a
> > code (24- low/high tps voltage ),
> > the motor had no reaction, other than to keep chugging away.
> > i did plug the tps back in and the code is still there but i figure it
> > will clear in 4 or 5 starts.
>
> > I have not gotten any codes ( other than the self -inflicted 24 )
> > Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of
> > doubt it.
>
> > All I got left on the TB to replace is the MAP sensor and that puppy
> > is about 150 clams.
> > I could throw more injector cleaner in the tank, but i feel that's not
> > the root problem.
> > Should i pull the TB?
>
> > Any pointers appreciated-- oh ya Is it possible to install a TPS
> > wrong?
> > Im not ready to take it to the garage just yet.
>
> > Thanks,
> > James

Re: 97 ZJ JGC - Wont idle cold and now barely when warm!!
 

In todays episode...

Checked the voltages on the TPS-- its cooked. Put back on my MOPAR one
and my MOPAR IAC--
The TPS is now working right but still no cold idle-- but once warmed
a little is fine.
Todays lesson is no more Chinese parts.

I am getting high voltages out of the MAP sensor, so I ordered that --
went to the dealer.
Also I only get 7KOhm from the intake manifold temp sensor which is
kind of low-- so I also ordered that.

I will install those tomorrow. If that fails then its onto the
coolant temp sensor, the O2 sensor.

jt


On Aug 29, 8:52 pm, jamest <jam...@sympatico.ca> wrote:
> Today I removed the TB and cleaned it thoroughly, reassembled it and
> still had no idle.
>
> iI did check the voltages ( Key on- not running ) on the TPS , oddly
> the center terminal ( orange ) read 4.67v and the
> terminal to the left of center (BLK) read .01v and right of
> center(BRN) seemed to be around 5.0V.
>
> >From my understanding of the shop manual i would think the center
>
> terminal ( TPS output to PCM ) should be low ( <1v) when 'idle'. and 5
> when Wide Open.
> When my buddy comes over tomorrow I will check the range/sweep of the
> TPS . Its a new TPS sensor- but you never know.
> , the IAC is 10 months old and the MAP sensor is original. The PCM was
> replaced in 2002.
>
> Tomorrow , I am checking the electrics on the TPS/IAC/MAP.
> Im still not ready to take it to the garage just yet:-)
>
> Any pointers appreciated,
> James
>
> Solutions to Date
> Replace TPS
> Replace CKPS
> Remove and clean throttle body.
>
> Parts to Date on this problem
> CrankP Sensor
> Throttle Pos Sensor
> TB Gasket
> 12 hours
>
> On Aug 28, 8:49 pm, jamest <jam...@sympatico.ca> wrote:
>
> > Greetings,
> > I have about 81,000 miles or about 135,000 km. And keep it nice and
> > maintained.
>
> > Last fall i had problems , ZJ would not idle when cold, i replaced the
> > IAC and we were back in business.
> > I spayed a can of TB cleaner into the TB as well and threw in a can of
> > injector cleaner in the tank.
> > It never idled smoother.
>
> > Its been running great until this week. Developed the no cold idle
> > again.
> > Its wants to idle at about 250-300 instead of its normally robust 500
> > rpm,
> > it seems to surge and fall from 225 to just under 500.
>
> > It runs fine at speed on the freeway.
>
> > I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB
> > cleaner into the IAC port and wiped it out.
> > I stuck my finger into the IAC port with a rag as far as I could go
> > and rotated it to clean.
> > Is it possible I broke something in the TB when I did that?
> > I kind of doubt it cuz thats what i did last fall and everything was
> > fine afterward.
>
> > Replaced the TPS , if anything it seemed to idle even lower. ( It was
> > not a mopar TPS )
>
> > Today, just trying the easy stuff replaced the crankshaft position
> > sensor, still runs bad -- this was more a preventative step ( i.e
> > hoping ).
>
> > I disconnected the TPS while its was idling and all it did was throw a
> > code (24- low/high tps voltage ),
> > the motor had no reaction, other than to keep chugging away.
> > i did plug the tps back in and the code is still there but i figure it
> > will clear in 4 or 5 starts.
>
> > I have not gotten any codes ( other than the self -inflicted 24 )
> > Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of
> > doubt it.
>
> > All I got left on the TB to replace is the MAP sensor and that puppy
> > is about 150 clams.
> > I could throw more injector cleaner in the tank, but i feel that's not
> > the root problem.
> > Should i pull the TB?
>
> > Any pointers appreciated-- oh ya Is it possible to install a TPS
> > wrong?
> > Im not ready to take it to the garage just yet.
>
> > Thanks,
> > James

Re: 97 ZJ JGC - Wont idle cold and now barely when warm!!
 

In todays episode...

Checked the voltages on the TPS-- its cooked. Put back on my MOPAR one
and my MOPAR IAC--
The TPS is now working right but still no cold idle-- but once warmed
a little is fine.
Todays lesson is no more Chinese parts.

I am getting high voltages out of the MAP sensor, so I ordered that --
went to the dealer.
Also I only get 7KOhm from the intake manifold temp sensor which is
kind of low-- so I also ordered that.

I will install those tomorrow. If that fails then its onto the
coolant temp sensor, the O2 sensor.

jt


On Aug 29, 8:52 pm, jamest <jam...@sympatico.ca> wrote:
> Today I removed the TB and cleaned it thoroughly, reassembled it and
> still had no idle.
>
> iI did check the voltages ( Key on- not running ) on the TPS , oddly
> the center terminal ( orange ) read 4.67v and the
> terminal to the left of center (BLK) read .01v and right of
> center(BRN) seemed to be around 5.0V.
>
> >From my understanding of the shop manual i would think the center
>
> terminal ( TPS output to PCM ) should be low ( <1v) when 'idle'. and 5
> when Wide Open.
> When my buddy comes over tomorrow I will check the range/sweep of the
> TPS . Its a new TPS sensor- but you never know.
> , the IAC is 10 months old and the MAP sensor is original. The PCM was
> replaced in 2002.
>
> Tomorrow , I am checking the electrics on the TPS/IAC/MAP.
> Im still not ready to take it to the garage just yet:-)
>
> Any pointers appreciated,
> James
>
> Solutions to Date
> Replace TPS
> Replace CKPS
> Remove and clean throttle body.
>
> Parts to Date on this problem
> CrankP Sensor
> Throttle Pos Sensor
> TB Gasket
> 12 hours
>
> On Aug 28, 8:49 pm, jamest <jam...@sympatico.ca> wrote:
>
> > Greetings,
> > I have about 81,000 miles or about 135,000 km. And keep it nice and
> > maintained.
>
> > Last fall i had problems , ZJ would not idle when cold, i replaced the
> > IAC and we were back in business.
> > I spayed a can of TB cleaner into the TB as well and threw in a can of
> > injector cleaner in the tank.
> > It never idled smoother.
>
> > Its been running great until this week. Developed the no cold idle
> > again.
> > Its wants to idle at about 250-300 instead of its normally robust 500
> > rpm,
> > it seems to surge and fall from 225 to just under 500.
>
> > It runs fine at speed on the freeway.
>
> > I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB
> > cleaner into the IAC port and wiped it out.
> > I stuck my finger into the IAC port with a rag as far as I could go
> > and rotated it to clean.
> > Is it possible I broke something in the TB when I did that?
> > I kind of doubt it cuz thats what i did last fall and everything was
> > fine afterward.
>
> > Replaced the TPS , if anything it seemed to idle even lower. ( It was
> > not a mopar TPS )
>
> > Today, just trying the easy stuff replaced the crankshaft position
> > sensor, still runs bad -- this was more a preventative step ( i.e
> > hoping ).
>
> > I disconnected the TPS while its was idling and all it did was throw a
> > code (24- low/high tps voltage ),
> > the motor had no reaction, other than to keep chugging away.
> > i did plug the tps back in and the code is still there but i figure it
> > will clear in 4 or 5 starts.
>
> > I have not gotten any codes ( other than the self -inflicted 24 )
> > Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of
> > doubt it.
>
> > All I got left on the TB to replace is the MAP sensor and that puppy
> > is about 150 clams.
> > I could throw more injector cleaner in the tank, but i feel that's not
> > the root problem.
> > Should i pull the TB?
>
> > Any pointers appreciated-- oh ya Is it possible to install a TPS
> > wrong?
> > Im not ready to take it to the garage just yet.
>
> > Thanks,
> > James

Re: 97 ZJ JGC - Wont idle cold and now barely when warm!!
 

jamest wrote:
> In todays episode...
>
> Checked the voltages on the TPS-- its cooked. Put back on my MOPAR one
> and my MOPAR IAC--
> The TPS is now working right but still no cold idle-- but once warmed
> a little is fine.
> Todays lesson is no more Chinese parts.

FWIW, if you go NAPA there are two flavours.. regular NAPA and Echylin.
The Echylin parts are more expensive but also identical to OEM. In many
cases from the same vendor.

--
DougW