Fuel pressure when it will start and when it will not start is the same, about 40 psi. Also, what I did was having someone crank the engine while it's not starting and with my fuel pressure gauge, release the fuel pressure, then it builds back up to 40 really quick but still doesn't start. So it would appear that fuel is not my problem.

Regarding the module, there is already a new one in there, it's the second one. I never had them tested, but I would have a hard time believing that 2 new modules could be bad and cause the exact same problem. How does one go about testing the module?

 

Best test is to get a good GM one or a known good one and see if that cures the problem. Are you getting spark and what color is the spark?

 

Getting spark, although it seemed a little weak. I think it was like orange or yellow, but was hard to really see cause it wasn't all that bright. Does that sound about right?

 

Sounds like a coil problem because the spark should be blue.

 

Brand new coil though. Also, I think I may have did the test wrong. I didn't ground the spark plug to anything, just had it hanging from something. Last night, I re-did the test by laying the spark plug on the intake manifold to ground it and the spark then became blue, but that was while the car actually started. I need to do the test again tonight while the car is in it's dead mode to see if it's still blue.

If it ends up not being blue, but say my coil is good, what other item in the ignition system could cause a weak spark? I really think this thing is weak spark now because I always have fuel pressure and my injectors always seem to be firing, at least by what the noid light indicates.

 

We'll need to see what it is in dead mode with the plug threads grounded.