crazy idle...

[BronKitis]

88 BII with a 2.9. The idle is very inconsistant ranging from 800-1200 rpm... When I took it for a drive this wknd everytime I'd push the clutch in the idle would skyrocket to 2500 RPM until I stabbed the throttle. It then would go back its "normal" idle.... What is going on???

 

[Spitfire1975]

Start by pulling codes. Probably have a vacuum leak or bad sensor. You are going to have to start a process of elimination to find the problem(s).

 

[adsm08]

Mine does the same thing, its a sticky IAC.

Shoot some WD-40 in both sides of the IAC and on the end of the throttle cable, should help a little.

 

[BronKitis]

What's an IAC?

 

[adsm08]

Idle Air Control valve.

Cylinder looking thingy (yes, that's a technical term) bolted to the passenger side of the throttle body.

Yours is gonna look slightly different, but thats about the same basic unit.

 

[BronKitis]

Thanks man. Gonna need it to hold a steady idle to pass emmissions. Hope thats all it is!

AJ