If wires are non OEM, they tend to slide off the casing where you plug into the plug tubes. This would result in the wire not reaching the spark plug causing the misfiring.

Recheck the wires for snugness and ensure the wires are reacing the spark plugs. Have the coils tested and ensre you have bright blue sparks.

Answered by KHLow2008 (expert)
40,318 answers provided