JeffreyH

I got a 2000 5.3 lm7 that I am swapping into a 2004 chevy s10. Have spark to coils and have doubled checked everything. Grounds are good, all sensors are good and have power, PCM is getting power and sending all power, PCM has been tuned for VATS delete and everything else. Coils have power coming to them but no power to the spark plugs, used an in-line spark tester and nothing. Engine was running one day and just completely lost spark the next. Will barely sputter if sprayed with ether but will NOT stay running. Have checked injectors and they are good and spraying good. Completely lost on what to do, can anyone help?? Have researched everything and keep getting told its ground but have tripled checked and not it. Have even tried to manually ground each set of coils and nothing. Have checked all wiring to sensors and everything checked out for power and ground. Have checked all PCM pins and each one is doing its job as far as power and ground, so super lost please help??!!!

G Atsma

Post a problem in ONE FORUM ONLY!
Don't multi-post.

the_merv

iTrader: (88)

How are you checking the power at the Coils?

Full Power

The Crank Position Sensor, right above the starter has 3 wires in: Ground ref (0 Volts), +5Volts ref, and Signal. Make sure all three of those are intact, and connected. Lose 5 volts there, you'll get No Spark.