borrowed a obd1 scanner...pulled code 34 map/vac sens lo and I pulled data and noticed it was rapidly running lean then rich lean then rich.....Map sensor reading were 38kpa @ 1.54v and TPS .82 (idle)
While in Drive with foot on brake Map is 55kpa @ 2.38v Temp @ 185 degrees (running...
87 Silverado cuts off at stop lights in drive and neutral. stumbles and cuts out on accel surging real bad just very unresponsive. new IAC New Injectors I have checked for vaccum leaks....The previous owner installed a holley tbi and had 350 injectors in it (its a 305) please help!!