5.0 spark issue? need help!

throwback_king

New Member
Jun 12, 2010
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KC,MO
Ok I have an 87 gt in which i converted to Mass air using an 89 harness and c3w computer. before i took the engine out and rebuilt it it had spark, now with new engine and harness its not getting spark. the weird thing is, the coil isnt getting spark when turning over but is gettign spark when u turn the key back to the off position. I have already replaced the ignition switch and tested voltage to the coil and they are fine.

I just tested the number one plug wire for spark: it got spark with the dizzy spout unplugged but NO spark with it plugged in?? again this is an 87 5.0 car with a 89 c3w ecu and 89 mass air harness.

Thanks,

Brandon