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1007 1500 w/305 Vortec blowing ecm-i fuse and coils


b1lk1
02-08-2011, 08:27 PM
I have a truck I am working on that has started to eat ecm-i fuses and coils. Should I be looking for shorted wires or does this sound pcm related? Truck has 370K KM so it is definitely far from new, lol. Any suggestions?
777stickman
02-09-2011, 11:04 AM
From my '98 service manual it looks like the ECM-1 fuse supplies ign voltage to the VCM, CKP, ICM, Coil & all fuel injectors. This power comes from the ign sw in the "run" & "start" positions.

So, the ? is, does the fuse blow in the run position or start position and is it consistent or just sometimes?

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