hi i have a 2.8 87 s10 when coming to a stop it stalls but only after it has been running for about 30mins i'm guessing closed loop mode .it also stalls in gear foot on brake when you turn on the a/c this also after it has been running awhile .just rebuilt tbi change icm ,iac,injecters ,.i have the timing set at 10btdc hope this is right i have done the jumper to set the iac the only thing i haven't done is egr could this be the problem and do i have to pull the tbi to get to it ? hope not because there goes another intake gasket .i recently redone the motor could value lash be my problem ?i did what they said in the book 3/4 of a turn and the truck would not start but i backed it off 1/2 a turn it started right up no clacking any help would be great tried of wife saying it needs to be sold i love my s10 !