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1986 GMC Suberban 454 w/hei by jason
I have just installed a new cap and rotor on my 86 suburban 454 w/hei and replaced spark plugs. It starts right up but runs like crap now--I think i mixed up the ignition wires---now im lost and my truck shakes and rattles. Cap and rotor were installed correctly fired up and ran great---when i changed plugs and wires ---- runs horrible. is there a diagram of HEI AND FIRING ORDER SO I CAN GET BACK ON THE ROAD----THANKS!!!!!!!!
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