I just installed a new set of plugs. To gain access to the front cylinders, I removed some vacuum lines. After replacing the lines the car now idles too high. The lines are intact with no apparent leaks. The speed initially is @ 1800 RPM. After about 20 seconds it will gradually drop to @ 800 RPM. Shifting into drive or touching the accelerator will send it back up to 1800. The time that it takes to drop back down to correct idle decreases as it warms up but never gets less than about 8 seconds.
There was no problem with the idle before I changed the plugs. It seems reasonable that something was disturbed while changing the plugs but, on the other hand, maybe it is an unrelated coincidence. Any ideas?
have the same problem?
Monday, April 6th, 2009 AT 8:41 PM