Msd box causeing backfire out exhaust!!
#12
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not scared yet. i been busy lately but had time thursday night to mess with it. i took out the msd and started it up and it still back fired, then i was feeling the exhaust headers and noticed that #2 & #4 headers were cold. so i checked the plug wires and YES i had them crossed, so i fixed that and reinstalled the msd box and it runs great.!!!!
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