silver-mod-o

iTrader: (15)

After swapping the new motor in, trying to crank and getting nothing, we've double checked the cam/ crank sensors, checking the wiring harness, we don't have spark at all.... I don't have a clue as to why... Any help?

dirt track racer 81

iTrader: (45)

checked all your grounds? just gotta go a double check everything

silver-mod-o

iTrader: (15)

Checked that, found two loose but didn't help, I'm sure it didn't hurt anything either.

blackbeast ss

iTrader: (4)

did you do disconnect the pcm/reflash? you might need to do a crank relearn maybe . .

lownslo

iTrader: (3)

Man we have checked everything and then again, and went and ate a pop-tart and come back and checked! Its a pita for sure! Could it have anything to do with security? What would fix an issue like that?
Thanks guys!

silver-mod-o

iTrader: (15)

You have to have it running to do a relearn..... But yes, I did an entire reflash last night when we ran into the problem... And yes, skrawberry pop tarts are de-lish....

dlt76028

iTrader: (13)

sounds like a theres a ground your missing?
starter all hooked up with all wires?

gmc6.0

does the truck turn over at all, if so it happen to me too, did you switch out computers, i did a 6.0 swap from my 4.8 and the 6.0 computer had a secruity lock on it. i put the 4.8 up and the truck ran, not right but ran...took it to a friend and had it dyno he fixed the computer and ran like a champ

00Silv4.8

iTrader: (10)

I would go with loose connection of some sort somewhere. Check all the plugs? (haha, sorry Corey). Um.. I donno really sounds like a bitch man. Hope you get it to fire

silver-mod-o

iTrader: (15)

Turns over, no spark...

Same PCM, the busted 5.3 that I pulled ran the same day as the motor swap.... The 5.7 should crank and idle on the 5.3 tune... Were leaning towards it being something wrong with or a bad crank sensor all together. I'm going to swap them tomorrow.