Recently replaced 97 5.7 with junkyard engine, no have no spark situation, have tested and replaced all the usual suspects; new coil, ignition control module and crankshaft position sensor.

Asked by jeffvan828 Feb 14, 2015 at 09:03 PM about the 1997 Chevrolet C/K 2500 Cheyenne LB HD 4WD

Question type: Maintenance & Repair

Recently replaced 97 5.7 with junkyard engine, no have no spark situation, have tested
and replaced all the usual suspects; new coil, ignition control module and crankshaft
position sensor. Still have zero spark, please am I missing something? Thanks Jeff

103,735

Reelin68 answered 9 years ago

Not sure about this. Does the engine Vin# have to match the factory ECU? Is the engine you put in a '97 also? I know on some vehicles this makes a difference. You may want to call a Chevy dealer.

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61,205

Andrew answered 9 years ago

What year 5.7 did you get?

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jeffvan828 answered 9 years ago

I found the problem, i had a short in the wiring harness, but when I did the truck started it dropped a valve in #7 cylinder, so back to square one.

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Recently replaced 97 5.7 with junkyard engine, no have no spark situation, have tested and replaced all the usual suspects; new coil, ignition control module and crankshaft position sensor.

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Recently replaced 97 5.7 with junkyard engine, no have no spark situation, have tested and replaced all the usual suspects; new coil, ignition control module and crankshaft position sensor.

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