Mach 1 problemo...

[harrisonfiveo]

ya'll havin a problem with your idle raising by itself?
after i drive for a while ( 30min to work) when i sit at a redlight my idle creeps up to like 1200-1300rpm, and in between shifts it'll raise to about the same...doesnt do it all the time though.

Only mods are:

c&l maf meter and tube
mac catted prochamber with single chamber flowmasters.

 

[STLShelby]

Nope, but i got the stock air intake.

 

[Crzyhrse]

I hear alot of people talking about the IAC valve with hanging RPM's I believe. Maybe it's that. I've got the C@L system also and mine runs perfect. I've never had any problems with hanging or raising RPM's.

 

[frathouse]

Sounds like an IAC issue to me...

 

[Reimann]

Mine did that once. It kinda freaked me out at the time but it never did it again and I forgot about it.

 

[Mach1Run]

have the carbon cleaned off the iac or do it yourself. My idle vary about 200-300 rpm from time to time, cleaned the IAC and no more variance.