4.0 swap - High Idle

[lilfordrunner]

So, after doing some more tests, this is what we have come up with.

When running the the engine with the IAC attached it idles like a son of a gun but there is little to no miss on deceleration.

When running the engine with the IAC detached it idles…better. (1400 or so) but there is a prominent miss on deceleration.

Thoughts?

 

[Andy D]

None whatsoever. The Rat idles high , about 1500, when cold and settles down after 10 minutes or so. I think about it a lot, but havent done anything yet