Need Some Input. My Jetta Will Miss Fire In Warm Temps. At First This Problem Happened Only When Running The A/c, It Feels Like Having Water In The Distribitor Cap. I Have To Rev Eng. To Keep From Jurking/losing Pwr. It Feels Like It's Going To Stall But When I Let Up On The Gas It Will Idle Normal. Plugs, Wires, Dis. Cap Changed A Few Years Back When Trying To Tackle The Problem And No Help. Now It's Starting To Do It Without A/c Running But On Warm Days Or After Sitting In Traffic. One Other Thing That It Does Is At First Start, Rough Idle , But Once The Car Is Warm, Starts Fine.....any Ideas?

If it's misfiring, try spraying the ignition coil with water. It's a cheap, quick test.

Well, tried the water thing. I read where you advised someone to do that when they had trouble in wet conditions. I pulled a few fault codes one being 2231. I looked at the valve and ck'd with meter as called out in Bently Manual and seemed OK. Not sure if this valve would cause problem.....

Yes, the water trick is easy & since coils are so common to fail its a good first step. You may want to closely examine each plug wire & especially the coil wire & connections to the cap (& coil). They were common to deteriorate. It still sounds like a secondary ignition problem to me. Code 2231 can also be from vacuum leaks & EGR problems. How does the vacuum system look, particularly the larger hose coming off the valve cover that goes beside the timing cover & into the plastic pipe to the crankcase. I've seen every part of that system fail, grommet in the valve cover, valve itself, rubber hose, plastic pipe, & connection at the block. What were the other codes?

The other codes were 2111, 4412, 4413,... fuel injector faults, which I believe might be due to the original problem. I changed plugs, cap, rotor today...to see if it gets back to only happening during a/c operation. Wires are ok, I replaced them when problem started. Going to go over the vacumn system again and look where you suggested. I'll let you know. Thanks for the help........

Were all four injector faults there or just those two? A quick check of the injector resistance may be worthwhile. Resistance should be 14-21.5 Ohms betwen the two terminals. You can also check between the ECM pins. All test between pin #23, Injector 1 is pin #24, 2 is #2, 3 is #25, 4 is #26. I've seen problems with the injector harness connector behind the head too, it's worth checking as it could be failing when hot.

what kind of engine dose this jetta have?? i new have a few thing to try!!!

Need Some Input. My Jetta Will Miss Fire In Warm Temps. At First This Problem Happened Only When Running The A/c, It Feels Like Having Water In The Distribitor Cap. I Have To Rev Eng. To Keep From Jurking/losing Pwr. It Feels Like It's Going To Stall But When I Let Up On The Gas It Will Idle Normal. Plugs, Wires, Dis. Cap Changed A Few Years Back When Trying To Tackle The Problem And No Help. Now It's Starting To Do It Without A/c Running But On Warm Days Or After Sitting In Traffic. One Other Thing That It Does Is At First Start, Rough Idle , But Once The Car Is Warm, Starts Fine.....any Ideas?


Hello, I'm experiencing a very similar problem with my 1995 Jetta. Were you able to resolve your issue, if so, what was it?

I have replaced my rotor, distributor, wires, plugs and I didn't see any sparks when I sprayed my ignition coil.

I would love any information you have. I really don't want to go back to the dealership again (It's getting expensive).

Thanks,

Jeff

Hey Mlstarnded did you find out what the problem was?

I have a similar problem as well. When at high rpm's there is a large stumble or hesitation. I replaced the coil and I am going to check for codes in the morning. What did some of you find that had this issue?

Thanks
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