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was it doing this before all that work was done to the car ?
ok so since the plug wires where changed it starting doing this ?
did you replace the spark plugs ?
are you 100 % sure the firing order is correct ?
this is a 3.8 engine correct ?
ok and just to be sure it was NOT doing this before the wires and plugs where changed ?
ok first using these 2 pictures can you be sure the firing order is correct where the wires on the coils are going to the correct cylinders and be sure the plug wires are connected tight to the spark plugs correctly ?