Allright Im down to my last hope before I put a bullet in this old truck. The truck is a 96 k1500 with 4.3 5 speed manual to 5.7, 5.7 was out of 99 suburban auto The truck will turn over but no spark from the coil pack im getting fuel to the motor, I have power to the coil pack, Vats is shut off so that shouldnt be a problem now my tuner said it was a bad pcm and he got me a new pcm still nothing and this is getting on my last nerve, really need some help from ya guys input is in real apprication

 

crappy connections? crappy wires?

 

I checked all my grounds and the wiring harness should have been good cause ran when pulled out of suburban just wondering if somebody has ran into this problem before I read tons of posts for the ls motors but not the k motor swaps

 

The ignition system on that series 5.7 is basically a HEI with an external coil. As long as it has power and ground it should fire. Personally I would check the module/pickup inside the distributor.

The way I understand this system to work is: 12 Volts to the coil. Magnetic pickup/Module breaks the ignition as the distributor passes each magnet. Which triggers the spark to that particular plug.

Did you check to see that the distributor wasn't damaged at the time of the removal by the firewall. (Kind of common when the transmission cross member is removed.)

 

well when i put the motor back in I put new parts on the distributer to make sure I wouldnt have any problems like that but still no spark it seems kinda weird

 

Just a thought, but did you check the fuses?

 

Check to make sure there is power to the coil while it is cranking. Most power sources shut off while cranking, and if you hook into the wrong one it won't fire.

 

got power to coil while cranking and power to everything replaced the coil with new one gonna put a new crank position sensor in today maybe that might work but dunno at a loss I cant figure it out

 

Yeah, good idea, I bet your crank sensor is shot.

 

Funny thing is my tuner says that isnt the prolblem said those things hardly go out and he has done many of these swaps, but one of my mechanics is saying it is well maybe it is maybe not wont get to till later today