car has a f1A procharger 355 basically the works. The car seems to run fine when im holding the gas down holding it at 1K rpm, but as soon as i let off the gas it stumbles to 700 then 600 and hesitates for about 3 seconds than stalls. idle is set to 1100 rpm... tune is in speed density.

 

What are your IAC counts, and what does your tune look like?