High Idle in my 86 cherokee
 

I have an 86 jeep Cherokee with a 2.5 TBI motor, it idles at about 2000 rpm
once it gets warm, unless I use the motor to slow down the engine, then it
will stay at about 1100. I cannot according to the sticker under the hood
adjust the idle. Any Ideas about what I should look for?

Any thoughts would be greatly appreciated,
Thanks much

Re: High Idle in my 86 cherokee
 

I feel for you, the only thing I can think of to do is maybe clean
the Throttle Position Sensor. Something is telling your computer to wind
up your idle speed step motor, as yours is apparently working otherwise
you couldn't cross wire it and turn it down. I've given up on a couple
and just cut a beer can to the motor's gasket size and just blocked it
off, (looks like it's hooked up for smog) and used the hidden throttle
stop screw. Hope you can get if fixed right.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Dave Heinrich wrote:
>
> I have an 86 jeep Cherokee with a 2.5 TBI motor, it idles at about 2000 rpm
> once it gets warm, unless I use the motor to slow down the engine, then it
> will stay at about 1100. I cannot according to the sticker under the hood
> adjust the idle. Any Ideas about what I should look for?
>
> Any thoughts would be greatly appreciated,
> Thanks much

Re: High Idle in my 86 cherokee
 

I feel for you, the only thing I can think of to do is maybe clean
the Throttle Position Sensor. Something is telling your computer to wind
up your idle speed step motor, as yours is apparently working otherwise
you couldn't cross wire it and turn it down. I've given up on a couple
and just cut a beer can to the motor's gasket size and just blocked it
off, (looks like it's hooked up for smog) and used the hidden throttle
stop screw. Hope you can get if fixed right.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Dave Heinrich wrote:
>
> I have an 86 jeep Cherokee with a 2.5 TBI motor, it idles at about 2000 rpm
> once it gets warm, unless I use the motor to slow down the engine, then it
> will stay at about 1100. I cannot according to the sticker under the hood
> adjust the idle. Any Ideas about what I should look for?
>
> Any thoughts would be greatly appreciated,
> Thanks much

Re: High Idle in my 86 cherokee
 

I feel for you, the only thing I can think of to do is maybe clean
the Throttle Position Sensor. Something is telling your computer to wind
up your idle speed step motor, as yours is apparently working otherwise
you couldn't cross wire it and turn it down. I've given up on a couple
and just cut a beer can to the motor's gasket size and just blocked it
off, (looks like it's hooked up for smog) and used the hidden throttle
stop screw. Hope you can get if fixed right.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Dave Heinrich wrote:
>
> I have an 86 jeep Cherokee with a 2.5 TBI motor, it idles at about 2000 rpm
> once it gets warm, unless I use the motor to slow down the engine, then it
> will stay at about 1100. I cannot according to the sticker under the hood
> adjust the idle. Any Ideas about what I should look for?
>
> Any thoughts would be greatly appreciated,
> Thanks much

Re: High Idle in my 86 cherokee
 

I feel for you, the only thing I can think of to do is maybe clean
the Throttle Position Sensor. Something is telling your computer to wind
up your idle speed step motor, as yours is apparently working otherwise
you couldn't cross wire it and turn it down. I've given up on a couple
and just cut a beer can to the motor's gasket size and just blocked it
off, (looks like it's hooked up for smog) and used the hidden throttle
stop screw. Hope you can get if fixed right.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Dave Heinrich wrote:
>
> I have an 86 jeep Cherokee with a 2.5 TBI motor, it idles at about 2000 rpm
> once it gets warm, unless I use the motor to slow down the engine, then it
> will stay at about 1100. I cannot according to the sticker under the hood
> adjust the idle. Any Ideas about what I should look for?
>
> Any thoughts would be greatly appreciated,
> Thanks much

Re: High Idle in my 86 cherokee
 

That 'usually' means a vacuum leak. Cracked vacuum line, loose TB,
loose intake manifold, blown brake booster....

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

Dave Heinrich wrote:
>
> I have an 86 jeep Cherokee with a 2.5 TBI motor, it idles at about 2000 rpm
> once it gets warm, unless I use the motor to slow down the engine, then it
> will stay at about 1100. I cannot according to the sticker under the hood
> adjust the idle. Any Ideas about what I should look for?
>
> Any thoughts would be greatly appreciated,
> Thanks much

Re: High Idle in my 86 cherokee
 

That 'usually' means a vacuum leak. Cracked vacuum line, loose TB,
loose intake manifold, blown brake booster....

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

Dave Heinrich wrote:
>
> I have an 86 jeep Cherokee with a 2.5 TBI motor, it idles at about 2000 rpm
> once it gets warm, unless I use the motor to slow down the engine, then it
> will stay at about 1100. I cannot according to the sticker under the hood
> adjust the idle. Any Ideas about what I should look for?
>
> Any thoughts would be greatly appreciated,
> Thanks much

Re: High Idle in my 86 cherokee
 

That 'usually' means a vacuum leak. Cracked vacuum line, loose TB,
loose intake manifold, blown brake booster....

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

Dave Heinrich wrote:
>
> I have an 86 jeep Cherokee with a 2.5 TBI motor, it idles at about 2000 rpm
> once it gets warm, unless I use the motor to slow down the engine, then it
> will stay at about 1100. I cannot according to the sticker under the hood
> adjust the idle. Any Ideas about what I should look for?
>
> Any thoughts would be greatly appreciated,
> Thanks much

Re: High Idle in my 86 cherokee
 

That 'usually' means a vacuum leak. Cracked vacuum line, loose TB,
loose intake manifold, blown brake booster....

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

Dave Heinrich wrote:
>
> I have an 86 jeep Cherokee with a 2.5 TBI motor, it idles at about 2000 rpm
> once it gets warm, unless I use the motor to slow down the engine, then it
> will stay at about 1100. I cannot according to the sticker under the hood
> adjust the idle. Any Ideas about what I should look for?
>
> Any thoughts would be greatly appreciated,
> Thanks much