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  1. Squirrelizer

    7.4 Vortec 2 cylinders not igniting with spark.

    I am at a loss right now. My 7.4 just won't run right. I have taken the spark plug out of the 2 cylinders and started the truck with them hooked to the spark plug wires. Both of them have spark but are not igniting. The truck still misses on the 2 cylinders. I have changed the 2 injectors out...
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