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Thanks all.....disconnected/reconnected Negative cable on battery in trunk. fixed problem.
tried to be careful that each plug was about as tight as when I removed the old one, also made sure plug wire went on each plug and then tightened...
Replaced 1 plug at a time so no issues with plug wire placement.....have no idea what an igniter is .
Not very car service oriented.....but changed my own spark plugs tonight. Now, check engine light is on and engine will not accelerate. Please...