Automatic Choke Adjustment
 

Jeep Cherokee Laredo 88mod, 6syl.Automatic 4L
Somethimes, even if the car is hot, it start with a very high RPM, and it
stays there until I kick the gas pedal down.
Could this have something to do with the choke ? and what should I check ?
Geir R.Pettersson

Re: Automatic Choke Adjustment
 

No choke on the Renix Fuel Injection. :-)
Clean and treat the electrical terminals for the TPS and the Air Stepper
Motor. You also might want to clean up the Throttle Body and Air Stepper
Motor.

Also in your case make sure the accelerator cable and the throttle linkage
are not binding.
--
later,
dave AKA vwdoc1
88 XJ 4.0 auto
82 Wag Ltd. 360 auto (parts truck)
88 FSJ-GW 360 auto (GRAND 88)
Chicago

"Fam_Pettersson" <gropette@online.no> wrote in message
news:lz6Ic.2909$v04.41529@news2.e.nsc.no...
> Jeep Cherokee Laredo 88mod, 6syl.Automatic 4L
> Somethimes, even if the car is hot, it start with a very high RPM, and it
> stays there until I kick the gas pedal down.
> Could this have something to do with the choke ? and what should I check ?
> Geir R.Pettersson
>
>

Re: Automatic Choke Adjustment
 

No choke on the Renix Fuel Injection. :-)
Clean and treat the electrical terminals for the TPS and the Air Stepper
Motor. You also might want to clean up the Throttle Body and Air Stepper
Motor.

Also in your case make sure the accelerator cable and the throttle linkage
are not binding.
--
later,
dave AKA vwdoc1
88 XJ 4.0 auto
82 Wag Ltd. 360 auto (parts truck)
88 FSJ-GW 360 auto (GRAND 88)
Chicago

"Fam_Pettersson" <gropette@online.no> wrote in message
news:lz6Ic.2909$v04.41529@news2.e.nsc.no...
> Jeep Cherokee Laredo 88mod, 6syl.Automatic 4L
> Somethimes, even if the car is hot, it start with a very high RPM, and it
> stays there until I kick the gas pedal down.
> Could this have something to do with the choke ? and what should I check ?
> Geir R.Pettersson
>
>

Re: Automatic Choke Adjustment
 

No choke on the Renix Fuel Injection. :-)
Clean and treat the electrical terminals for the TPS and the Air Stepper
Motor. You also might want to clean up the Throttle Body and Air Stepper
Motor.

Also in your case make sure the accelerator cable and the throttle linkage
are not binding.
--
later,
dave AKA vwdoc1
88 XJ 4.0 auto
82 Wag Ltd. 360 auto (parts truck)
88 FSJ-GW 360 auto (GRAND 88)
Chicago

"Fam_Pettersson" <gropette@online.no> wrote in message
news:lz6Ic.2909$v04.41529@news2.e.nsc.no...
> Jeep Cherokee Laredo 88mod, 6syl.Automatic 4L
> Somethimes, even if the car is hot, it start with a very high RPM, and it
> stays there until I kick the gas pedal down.
> Could this have something to do with the choke ? and what should I check ?
> Geir R.Pettersson
>
>

Re: Automatic Choke Adjustment
 

No choke on the Renix Fuel Injection. :-)
Clean and treat the electrical terminals for the TPS and the Air Stepper
Motor. You also might want to clean up the Throttle Body and Air Stepper
Motor.

Also in your case make sure the accelerator cable and the throttle linkage
are not binding.
--
later,
dave AKA vwdoc1
88 XJ 4.0 auto
82 Wag Ltd. 360 auto (parts truck)
88 FSJ-GW 360 auto (GRAND 88)
Chicago

"Fam_Pettersson" <gropette@online.no> wrote in message
news:lz6Ic.2909$v04.41529@news2.e.nsc.no...
> Jeep Cherokee Laredo 88mod, 6syl.Automatic 4L
> Somethimes, even if the car is hot, it start with a very high RPM, and it
> stays there until I kick the gas pedal down.
> Could this have something to do with the choke ? and what should I check ?
> Geir R.Pettersson
>
>

Re: Automatic Choke Adjustment
 

We had that issue with out 88 Cherokee 4.0.

It also would stall at the first or second stop in the morning.

That was caused by a dirty plug on the TPS or throttle position sensor
on the throttle body.

These plugs are only low powered computer plugs and the slightest dirt
makes them shaky.

I used a proper electronic contact cleaner the first time on it and it
lasted a couple years. The second time it went and stayed at high revs
way off road so I used WD40 on it. That has lasted almost a year to and
my wife just mentioned it needs another clean soon.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Fam_Pettersson wrote:
>
> Jeep Cherokee Laredo 88mod, 6syl.Automatic 4L
> Somethimes, even if the car is hot, it start with a very high RPM, and it
> stays there until I kick the gas pedal down.
> Could this have something to do with the choke ? and what should I check ?
> Geir R.Pettersson

Re: Automatic Choke Adjustment
 

We had that issue with out 88 Cherokee 4.0.

It also would stall at the first or second stop in the morning.

That was caused by a dirty plug on the TPS or throttle position sensor
on the throttle body.

These plugs are only low powered computer plugs and the slightest dirt
makes them shaky.

I used a proper electronic contact cleaner the first time on it and it
lasted a couple years. The second time it went and stayed at high revs
way off road so I used WD40 on it. That has lasted almost a year to and
my wife just mentioned it needs another clean soon.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Fam_Pettersson wrote:
>
> Jeep Cherokee Laredo 88mod, 6syl.Automatic 4L
> Somethimes, even if the car is hot, it start with a very high RPM, and it
> stays there until I kick the gas pedal down.
> Could this have something to do with the choke ? and what should I check ?
> Geir R.Pettersson

Re: Automatic Choke Adjustment
 

We had that issue with out 88 Cherokee 4.0.

It also would stall at the first or second stop in the morning.

That was caused by a dirty plug on the TPS or throttle position sensor
on the throttle body.

These plugs are only low powered computer plugs and the slightest dirt
makes them shaky.

I used a proper electronic contact cleaner the first time on it and it
lasted a couple years. The second time it went and stayed at high revs
way off road so I used WD40 on it. That has lasted almost a year to and
my wife just mentioned it needs another clean soon.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Fam_Pettersson wrote:
>
> Jeep Cherokee Laredo 88mod, 6syl.Automatic 4L
> Somethimes, even if the car is hot, it start with a very high RPM, and it
> stays there until I kick the gas pedal down.
> Could this have something to do with the choke ? and what should I check ?
> Geir R.Pettersson

Re: Automatic Choke Adjustment
 

We had that issue with out 88 Cherokee 4.0.

It also would stall at the first or second stop in the morning.

That was caused by a dirty plug on the TPS or throttle position sensor
on the throttle body.

These plugs are only low powered computer plugs and the slightest dirt
makes them shaky.

I used a proper electronic contact cleaner the first time on it and it
lasted a couple years. The second time it went and stayed at high revs
way off road so I used WD40 on it. That has lasted almost a year to and
my wife just mentioned it needs another clean soon.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Fam_Pettersson wrote:
>
> Jeep Cherokee Laredo 88mod, 6syl.Automatic 4L
> Somethimes, even if the car is hot, it start with a very high RPM, and it
> stays there until I kick the gas pedal down.
> Could this have something to do with the choke ? and what should I check ?
> Geir R.Pettersson

Re: Automatic Choke Adjustment
 

On Tue, 13 Jul 2004 14:06:09 UTC Mike Romain <romainm@sympatico.ca>
wrote:

> We had that issue with out 88 Cherokee 4.0.
>
> It also would stall at the first or second stop in the morning.
>
> That was caused by a dirty plug on the TPS or throttle position sensor
> on the throttle body.
>
> These plugs are only low powered computer plugs and the slightest dirt
> makes them shaky.
>
> I used a proper electronic contact cleaner the first time on it and it
> lasted a couple years. The second time it went and stayed at high revs
> way off road so I used WD40 on it. That has lasted almost a year to and
> my wife just mentioned it needs another clean soon.

I don't know if the TPS is the real culprit on the 88 (Renix) system
or not. No matter what I do mine will still stall after a cold start
if I take off down hill and use the engine to hold it going down with
my foot off the gas. If I tap the gas just before I stop, all is
well; otherwise it will stagger and frequently die when I put the
clutch in. I'm about convinced that it's a characteristic of the
computer where it's over-correcting for the engine braking and not
responding fast enough when it tries to get to an unloaded idle state.
If yours is like mine, when it staggers and doesn't die it surges
pretty good before settling down. Blasted nuisance, whatever it is.

--
Will Honea <whonea@codenet.net>