surging with MSD Airforce intake, LT1

[ccrp]

Gents,

weird issue. Stock TB on MSD intake (with supplied adapter plate of course) and all runs great after a flash for about 500-700 mls. Then slowly idle wants to hang and it gets to the point that stays at 2000 rpm and slowly very very slowly returns to idle. Very annoying in the city. It feels like air leak but i cant find one.

Stock engine, just headers and intake. DD table not touched under 40%.

reflash and all back and good, until it starts with it. Can something cause PCM to learn stupid things after a while?

i am at a loss?

[TriPinTaZ]

Post tune? Any logs? Could be a dozen reasons. What do your fuel trims look like after 500-700 miles when it starts?