Fast Idle

[Route 66]

I just started my car after replacing all the injectors. Started it an let it come up to temp. It idles ok but too high of RPM. Idles at 1100. Any one know what I might have done wrong. I thought I would check here first before takeing it apart again.. Thanks..E..

[GOLDCYLON]

Cheack your map sensor hose on the back side the plenuim. It prob came off

[XfireZ51]

Possibly may need to reset IAC.

[Route 66]

Cheack your map sensor hose on the back side the plenuim. It prob came off


Thanks for your help. I will check that tomorrow. I feel sure I put it on. Sometime back that hose came off when the motor backfired an it had a miss. That isn;t happening now it runs smooth. But I will check it.............Thank You..E

[Route 66]

Possibly may need to reset IAC.
How do I do that..E

[GOLDCYLON]

Other possibilities ...

http://www.zr1.net/forum/showthread.php?t=11753

Vac leaks and hose next to the front of the plenum behind the air horn may have popped off

[Route 66]

I would like to thank all of you for your help with this. Goldcylon your link was the most helpful. Thanks for taking the time to look it up. It has given me a number of things to look at. Although I think I will be pulling the plenum. I think I now know where the leak will be. I never thought about it being a vacuum leak. I was thinking electrical....Thanks Again..E

[bdw18_123]

I had a high idle problem too after I got my Z back together. Mine was higher at like 3K rpm though. Turned out that my TPS was not adjusted correctly.

So you might also want to check that your TPS (throttle position sensor) is properly calibrated. There is a procedure in the service manual that outlines how to check and adjust it.

[Route 66]

I had a high idle problem too after I got my Z back together. Mine was higher at like 3K rpm though. Turned out that my TPS was not adjusted correctly.

So you might also want to check that your TPS (throttle position sensor) is properly calibrated. There is a procedure in the service manual that outlines how to check and adjust it.

Thanks..I will look into that if what I found today doesn;t fix it. I took the plinum back off today. I found one of the larger plastic tubes was loose. I glued it back in. Tomorrow I will put it back togather an I will try again. I will read about the TPS tonight incase I have to go there........ Thanks E.

[GOLDCYLON]

If you can a clamp or ziptie can work wonders keeping these little buffers in place

[Route 66]

If you can a clamp or ziptie can work wonders keeping these little buffers in place


On the small ones I used black wire ties if they looked like they might leak. The one I glued looked like it had been glued before an come loose.

[Route 66]

Vacuum leak has been repaired. Thanks to all who wrote in to help. It was the large plastic tube. Runs ok except for a very slight hesitation if you try to accelerate quickly. I think that is caused from something else.:)