Hello,
not sure if anyone here can give some helpful insight.

I have a 95 4.3 tbi with manual trans. I spent years trying to figure out it’s idle hunt. Unfortunately I didn’t figure it out until after I installed megasquirt ms2 and found this forum. It was running pretty well but now I seem to have a problem with a hesitation when opening the throttle. I checked for spark, VE and spark tables have not changed. I am not 100 percent on what the IAC should be doing. The megasquirt forum has not helped that much.

Any help is appreciated.

will