Rough Idle ???

Buick Beginner

Where is my $$$ going?
Joined
Nov 9, 2001
Gentlemen,
I rebuilt my motor about 500 miles ago and I've worked out all my bugs except my rough idle. Sometimes the car idles fine, but most of the time it's rough. I reset the IAC but it did'nt seem to help. I drove around last week with the A/C on wide open for 45 minutes with a great smooth idle. But today after it warmed up and went into closed loop I got a rough idle. Now the car does have a Postons GT107 cam in it, but it's very mild, (202 duration and 505 lift I believe). Sometimes the rough idle will suddenly smooth out and pur like a kitten, then 2 minutes later it's rough again. Any ideas? - BB
 
Well

I'm running an extender chip, (with a Translator plus), as far as the fan goes I'm not sure if there's a connection or not. Do you think the IAC is going bad? - BB
 
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