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Po641 engine swap now no power to coils when cranking Silverado 03 5.3
3 years 3 months ago #46761
by Tyler
Replied by Tyler on topic Po641 engine swap now no power to coils when cranking Silverado 03 5.3
I see you've got a P0641 and a concern about the EOP sensor. We can fix that. 
But first we need to back up. You say you have no power to the coils during cranking - does that mean this truck is a crank no start?
What voltage readings did you take to determine there was no power to the coils? Please be specific about wire colors and locations.
Do the INJ1 and INJ2 fuses in the underhood fuse box have power on both sides of the fuse in Run and Crank?
But first we need to back up. You say you have no power to the coils during cranking - does that mean this truck is a crank no start?What voltage readings did you take to determine there was no power to the coils? Please be specific about wire colors and locations.
Do the INJ1 and INJ2 fuses in the underhood fuse box have power on both sides of the fuse in Run and Crank?
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