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Rough idle, acceleration is delayed, studders a lot and won't go in reverse

Tiny
JOCKHATER2
  • MEMBER
  • 1991 VOLKSWAGEN JETTA
  • 30,000 MILES
I replaced the "Idle Air Control Valve" with one that I found on an old golf about 6 months ago and that fixed my idle problems. I also replaced the "fuel pressure regulator" and that gave me my responsiveness back in the acceleration.

But the problems are back. I turned the car on and unplugged the "IACV" and the car continue to idle. Shouldn't unplugging that kill it?

The hoses connected to the IACV have small stress cracks but I don't see how it would cause the car to run that rough?

It may be bad fuel as I have gotten that SEVERAL times before. But it is just stressing me out.

The car also won't go in reverse (manual). My buddy says I should replace the shift bushings inside the car.
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Friday, September 2nd, 2011 AT 4:26 PM

2 Replies

Tiny
JOCKHATER2
  • MEMBER
  • 3 POSTS
Bt the way. The odometer stopped working at 99,999 before I got the car. It isn't 30,000 miles its most likely closer to 300,000
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Friday, September 2nd, 2011 AT 4:27 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
I would check for vacuum leaks. Also, recheck fuel pump pressure.
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Friday, September 2nd, 2011 AT 7:24 PM

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