Check fuel pressure when the car idles.
idles at 3000 will not go down 1993 grand prix gtp
It was the PCV vaule
I would be looking at the mass air flow senor.
It will while the program is running, but after it stops running there will be no change in computer speed.
1987 ford f150 5.0 starts at 1500 rpms, then idles down to 700 rpms.truck idles low when put into gear and also stall when i stop from time to time.any help will be greatly appreciated.
Look for a vacuum leak.
Barricades Of Heaven
I also wish someone would answer this question as my 1997 Ford contour does the same thing. It shakes and vibrates very bad when it idles and it idles really low. They set the idle up to make it so it wouldn't die so now when I start it it revs up really bad then it idles down then it idles down to low and shakes I also wish someone would answer this question as my 1997 Ford contour does the same thing. It shakes and vibrates very bad when it idles and it idles really low. They set the idle up to make it so it wouldn't die so now when I start it it revs up really bad then it idles down then it idles down to low and shakes
crankshaft sensor going.
Probably a vacuum leak. Check the EGR valve and other potential vacuum leak sources.
Could be a plugged fuel filter, time for a good tune up.