ls1blazer

iTrader: (6)

I have fuel pressure, injectors are working but I only have spark at one coil. All the other coils have power also just as the one that works. What else could it be ? The pcm was reprogrammed .

ghettocruiser

iTrader: (17)

If you have the correct power at all the coil wires, and one is sparking but the others arent, I would say its either a plug wire, plug, or harness issue. I cant remember if the coils fire per cylinder or if they fire per bank or what.

What harness are you using...who modified it to work...?? Who re-progammed teh PCM and what all did they configure?

Also what year is the motor...and what year is the harness/pcm?

J.

ls1blazer

iTrader: (6)

The pcm just had emissions,vats and a few other things deleted. It still has the stock programming .Engine and trans are an 02 lq9.

ls1blazer

iTrader: (6)

Found the problem ! The pcm was reflashed with a 02 van vin# . The van only has one coil hence only one coil firing . I got a stock pcm from the salvage yard for a 5.3 and it fired right up !