high idle problem

petert

Active Member
Messages
71
Reaction score
0
After numerous adjustments and staring blankly under the hood for hours the problem of a high idle never goes away. With webbers on the engine the car runs like a champ. Only issue is after it warms up it wants to stay at 20000 rpm when standing still (like coming to a stop). I always have to hit the gas pedal (while clutch is in of course) to knock it down to the respectable 10000 rpm. Nothing so far has been a permanent fix and I would like to correct this once and for all. Any suggestions you may have will be welcomed. Thanks, PeterT
 
I had the exact same issue with the Weber 32/36 I had on my BMW 2002 and the problem was the linkage would get caught before it went down all the way when you released the throttle slowly. Once I gave it a quick gas and let go it would go down to the correct position and not idle high anymore. The momentum of the quick release would help it pass the section that the bind was at and go all the way to where it had to be.
 
To Verde2002

You described my issue perfectly. Was there a solution?
 
How about checking out any return springs that the linkage has and replacing them or adjust.
On my CSI there the gas pedal has a spring with an a way to adjust the tension...not sure about your car but it may be a place to start.
abe
 
I've been working on a similar issue the last few days after having adjusted valves and resetting timing. At first it ran great then began to idles hight and a quick blip of the throttle would settle it down. I found that one of the vacuum hoses to the dizzy had dropped down and melted a hole through on the exhaust. A replaced hose and rerouting took care of it.
Hope this helps.
 
You described my issue perfectly. Was there a solution?



Unfortunatly I just dealt with it and sold the car that way but it was obviously a mechanical linkage getting caught. I would suggest you have someone slowly press and release the throttle from inside the car while the engine is off and you pay attention under the hood to where it binds. If not sure, use some type of marking paint on the linkages and see where it rubbs off and that will be the point of the issue. You might need to maybe loosen or tighten a certain linkage or maybe bend it slightly to avoid the bind.
 
Back
Top