Thread: PCM Stopped Working After Running For A Little

I just got done doing my top swap on my 98 gp gt and everything went good started it and ran perfect, couple days later I went to finish my exhaust and went to start it and would not start. I spayed some starting fluid in and fired up but only would stay running if I held the gas down a little, I pulled the gtp pcm and put my gt one back and it fired right up and ran perfect. So I pulled that one back out and put back the gtp and still no start. I have fuel, spark,but i don't think the gtp pcm is firing the injectors. Any ideas?

So it only stay runnin if you hold the gas pedal down.

Have you tried unplugging the MAF sensor and see if it changes?

I have to spray some starting fluid in it then it will start but dies after it burns that up.

Ok I unpluged the maf sensor and it started kinda. it would fire but I couldn't keep it going

are you disconnecting the battery when you swap out pcm's? if not might wanna try that. I am not sure but I think I remember hearing that when u swap pcm's that if you leave battery connected some of the stuff will stay "loaded" in the car somehow and mess with the new/swapped pcm. Just a thought. GL

Yea I left the battery disconnected for about 30 mins

L67 tb and inj, pcm been programed for the 4t65e