NEED HELP 88 k5 blazer 350 tbi stalling in gear while coasting and light acceleration. worse when cold but sometimes at engine temp
Ran injector cleaner in gas also cleaned throttle body No vacume leaks as far as I can tell. Runs fine in park put it in drive some times stalls. Driving down the road let off the gas it stalls but not every time PLEASE HELP thanx John

 

What RPM does it idle at in "P" and what RPM in "D"? Will it stall sitting at a stop in "D"?

 

no tach in truck in drive with breaks applied wont stall

 

I would suggest hooking up a scanner and monitering the IAC. Check for any codes as well.

 

Replaced the iac and throttle pos sensor no dice