Occasional studder
 

Hey all,
Hope your all having a good day.

I have an intermittent problem with my jeep, it sometimes will studder (that is rough idle for a moment down to like 200 rpm). This will happen sometimes while waiting at a light.
Also it sometimes happens while doing like 80 on the highway. Where you will have lack of power, then it will go away. I have floored it on occasion at 80 and i hear a knocking sound coming from the engine. Then after a moment or two, full acceleration. And then the problem goes away. I have cleaned the Iac motor in the past which fixed the problem, but now that is clean and this problem is still happening sometimes.
Very annoying. Can anyone help.

:ohwell:

Re: Occasional studder
 

Seriouslly, this is Bull ****,
Not one person can help.
Thats laughable.
I joined this forum because i thought there would be other
jeep owners that might have a similar problem.
Thanks for nothing.

Lance Chenkaluk

Re: Occasional studder
 

Easy Tiger....this is a small community, not everyone may have experienced the same problem or know of a solution, it may take several days for anyone to even look at your post....take a deep breath.

I would guess either your IAC or TPS is on its way out....

Re: Occasional studder
 

What engine do you have in your GC?

Re: Occasional studder
 

The 4.0 inline 6

This problem has lessened since i last posted the message but it still comes up
here and there.
It hasn't stalled at any occassion yet.
Frankly, I have never seen anything so absurdly difficult to diagnose.
Im planning on taking it to a mechanic for a tune up.

Thanks for responding.

Re: Occasional studder
 

I have no problems accellerating at full throttle when the problem isn't bugging the engine.

I have considered the Crankshaft positioning sensor but it runs fine decent most of the time.
Damn odd.


Sorry for being so grumpy in earlier posts. I just drives me crazy.

Lance.

Re: Occasional studder
 

Was going to suggest the CPS, my 4L does it occasionally to, usually when I've been sitting idling for awhile.
May be a wire that is getting worn near the sensor.

Re: Occasional studder
 

Maybe you should leave this forum.

Re: Occasional studder
 

ulric,
The guy apologized already. You've never been frustrated? I vote he stays.
Peter

Re: Occasional studder
 

Wow! That's a little harsh ulric

Re: Occasional studder
 

Lol. Maybe a little ;-) Sorry, I didn't see that he apologized!

Welcome to the forum Talon!

Re: Occasional studder
 

Did you fix it?
My bet is TPS.

Re: Occasional studder
 

I think i will have to wait till the 9th of sep. Cash flow and all.
It has an oil leak coming from the head, (slow) . and the idle issue. so im planning on
getting everything done at once. The rear brakes need replacement too.
Im hoping i can find an honest mechanic to do the work. If anyone has a suggestion,
i would love to hear it. I really like my jeep and i plan to keep it on the road even if
rent is 2 months behind.

Lance.
Jeep lover.

Re: Occasional studder
 

Have you done the basics like fuel filter and such. I understand the cash flow thing, been on disability for over a year, but the one thing I do have is time LOL. I would try looking for the obvious first like loose, worn or wearing wires, cleaning or replacing anything to do with fuel delivery. Then when you have exhausted all of the obvious things the mechanic will have a place to start that IS NOT at the beginning. It will be tedious. You did find an improvement when you cleaned the IAC so start there, you could also try running some concentrated injector cleaner through it, try to get access to the FACTORY shop manual as this will help you diagnose/track down the problems. Hope you find it quickly, try not to get frustrated(hard I know) as this will muddy the waters and you might overlook something. Good luck
John