Hey guys I have a 93 40thann. lt1 that i just got back from my mech. who installed my msd dist. & coil, new water pump,harmonic balancer.Last fall i had a dealership replace plugs & wires (platnum plugs) and purged my injectors,fuel filter.(NEVER GO BACK TO A DEALERSHIP AGAIN) Anyway I just put on a new MAP,ECT,SENSORS,ECM. Ran the car till it was sputtering out of gas then filled with fresh. Only premium gas and moble 1 . ever since i've owned it.(2 yrs now) Anyway- It all started with bad opti ,got it back from mech. 2weeks ago ran fine for about 2 weeks I put a stage 2 chip in it ran fine for two days then it started taking longer and longer to start in the mornings.It also stumbles on acceleration.It will spit and sputter until i release the throttle,knocks like its out of time to. He put on the scanner no codes!!! but the MAP sens. is putting out 500volts or ohmes whatever is supposed to come out of there(elecricaly challenged)! Its supposed to be 5 or .5 not 500! Fuel press. ok vacume tested ok to. OH yeah i have taken out the chip and put the old ecm back in.Same #@%$!!! didn't make a differance.

 

Can someone tell me why i cant delete this forum,i accedentally made 2 of them.