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1999 C6500 No Spark


Trek0024

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Posted

HI all,

 

A buddy of mine bought a C6500 with the 7.4L 454 in it. This is the motor with the individual coil packs for each cylinder. The issue we have run into with it, is that it is not getting any spark. What we have done to it so far is new crankshaft sensor, ECM tested and reprogrammed, and new distributor with cam shaft sensor. All the coils get power, cleaned all noticable ground wires, cylinders have great compression, and it cranks just fine. It has us completely stumped as to why there is no spark. Any suggestions would be greatly appreciated.

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