FLM Fan
Registered
Fast idle!
Did a search on this issue and found some similar problems but not all had solutions or the fixes didn't fit.
We just put the Cobra manifold on my 98 Mark CE. Also installed an Accufab throttle body and a JLT Performance Ram Air Intake (modified to fit) and tuned it on the Dyno.
The idle was up and it took a long time for the engine to return to a normal idle speed after blipping the throttle. About a half hour of running time and I got a CEL. We ran the code and it indicated the IAC. We changed the IAC and the problem continued.
The engine ran high idle until the IAC was unplugged and then it would return to normal.... but then it would give the code.
Before I have them start trying to correct this with the tune, thought I'd ask out here and see if anyone has another idea.
BTW... we did check for vacuum leaks all over the engine.
Did a search on this issue and found some similar problems but not all had solutions or the fixes didn't fit.
We just put the Cobra manifold on my 98 Mark CE. Also installed an Accufab throttle body and a JLT Performance Ram Air Intake (modified to fit) and tuned it on the Dyno.
The idle was up and it took a long time for the engine to return to a normal idle speed after blipping the throttle. About a half hour of running time and I got a CEL. We ran the code and it indicated the IAC. We changed the IAC and the problem continued.
The engine ran high idle until the IAC was unplugged and then it would return to normal.... but then it would give the code.
Before I have them start trying to correct this with the tune, thought I'd ask out here and see if anyone has another idea.
BTW... we did check for vacuum leaks all over the engine.