Just bought a 1979 Fairmont Futura that has a '92 5.0 & 5 sped manual swap along with a 9" rear end.
It has spent most of its life sitting in a garage. Had only 57,009Km on it when I bought it from Canada. Anyway, it idles perfect most of the time. However, occasionally it idles at almost 3.000 rpm and doesn't come down until you shut it off and restart it, or if driven down the road, it eventually idles normal. Other times, it will not stay running at all unless I keep my foot on the throttle. Sometimes it is idling fine, then starts to surge, gets worse & worse until it stalls, or I hold my foot on the throttle, or drive it for a while. Basically I never know what it is going to do at idle. 90% of the time it is perfect. Acts up more when cold than when warmed up. In my experience this is usually a sticking IAC valve, however, the P. O . already replaced the IAC solenoid and said it didn't help.
Any of you seen this issue before and found it to be anything other than the Idle Air Contol Valve?
Connect With Us