Blocking IAC on LT1 and re tune

[Mark Yacavone]

Originally Posted by Larry Hill

Might want to check with tech if the IAC adjuster replacement is below the throttle blades. The replacement could be viewed as an adjustable vacuum leak. Sometimes tech thinks a little differently than the racer.

I got bounced at Englishtown, in the early days of EFI for this sort of thing. The car builder was using an auxiliary petc o ck bleeder to control the idle. The IAC was disconnected and dead closed.
Lang and co. had to call CA. for a ruling. They were told that the idle vacuum air had to be controlled by the computer, or not at all. It was okayed in Div 2 ,at that time.

My Escort has an idle screw added instead of the stop screw on the throttle blades.
(IAC disconnected) It works fine with the mild camshaft.