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Why is your trailblazer misfiring after you replaced the spark plugs?
Wiki User
∙ 10y ago
Bad plug or something is misassembled.
Wiki User
∙ 10y ago
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Replaced spark plug and spark plug wires on Honda civic 1999 but still misfiring?
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ALL gasoline engines have spark plugs. Only diesels don't have spark plugs.
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A 2004 Chevrolet Trailblazer that has a 4.2 liter engine will have a spark plug gap of .044 inches. The best spark plugs for this vehicle are iridium spark plugs.
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The second spark plug is misfiring. Could be the coil right above the spark plug.
What else could be wrong if 2 cylinders are misfiring after getting water into the motor through the intake after the spark plugs and ignition coils have been replaced and it is still misfiring?
I really hate to be the one to tell you the bad news but it is possible that you have bent some valves. Take the spark plugs out of the missing cylinders and run a compression check on those two.
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They will normally last at least 75,000 + miles. Check your owners manual.
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The 2004 Trailblazer does not have plug wires. It has a coil pack per cylinder that connects direct to the spark plugs.
