[Teds89IROC]

It was tuned for a 160 t-stat, fans come on not much above that.

It happened the first block i turned onto last night after leaving the driveway. After a few minutes the next couple of turns and stops it acted normal, so I thought it was just a learning period for the new IAC. Got to my destination, pushed in the clutch at about 2500 rpm and they started to dip low like it was going to die but I couldnt tap the gas. It caught itself and rpms shot back to idle speed. On the way home the first stop i made it acted normal. A few minutes later approached a traffic light and it wanted to die.

EDIT: Unless the tune is to run in constant closed loop, bypassing a VSS, which from what I read I think it uses the 02 sensor reading. I'll clean the TB regardless and get in touch with the tuner to find out what was done regarding a VSS signal. I think I see a replacement VSS with a cable output as well for a mechanical speeodmeter which might be what I need