Could be. I need to check an oil leak in that area tomorrow (adapter, I think) so I'll put a magnet on them and see if they're steel.

I played with the warmup enrichment - changed it to 8.9 at -40* and about 3-4x that at 160*.... also changed a couple of other values and I can get it to idle a little lower - 1850 or so. It looks like it wants to go lean and the o2 brings it back. There's a little spitting/popping from the exhaust, but not too bad.

I tried plugging the IAC back in and turned on the stepper control.... still doesn't make much difference, so I need to figure out how to make the pintle extend via software. Any ideas?

Frank