no spark still... help please

[Sully]

just to add some more background on the truck

it has a set of shorty headers with 2.5" duals. I have a tune that is mostly for the size of tires and turning off the rear O2s. I also have a brand new drop in K&N air filter, front O2 sensors, fuel pump and filter. Im sure there is more stuff I have done, but thats whats coming to mind right now.

 

[barebones 1500]

anything on the cam sensor?

 

[Sully]

dinner is almost ready, then I'll go out there. I made the jumpers already though.

 

[barebones 1500]

ok I'm just hoping that is it and you can get it back on the road.

 

[Aloicious]

okay, so the truck has been running, its not like something is installed incorrectly from the engine swap or something.

this might sound strange, but go pull the dist cap off and look at the mounting tabs on the distributor body itself (where the bolts for the cap go into the body) if you can get up under there.

I had a similar no start problem a while ago that left me stranded. turned out to be the Einstiens at GM made the distributor body out of plastic (what a great idea right?), well the hold down tabs that the cap screws bolt to had hairline cracks in them and all of a sudden they just decided to not hold the cap down enough while I was driving home from work one day. took me forever to figure it out because the cap appeared to be on there good and screws seemed to be holding it down okay, but it wasn't. you could also try pressing down on the dist cap a little while someone trys to start it.

also, are the coil and ignition module mounted in the stock location?

 

[Aloicious]

when you replaced the ignition module did you use the thermal grease between it and the heatsink?

 

[Sully]

everything is in the stock locations.... and I pulled the coil wire off the dist and had no spark there. The dist may still have issues, but I'm not putting spark to the distributor. I guess that would have been a good point for me to share previously. Sorry about that.

 

[Sully]

I have also cleaned and verified each ground on the motor and frame.

 

[Aloicious]

ah, okay. hmm....

 

[Aloicious]

you mentioned you had a tune, but you said you got the PCM reflashed, I'm assuming that was flashed back to stock, correct?