2001 Isuzu Trooper/ intermittant misfire

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Old 09-09-16, 02:06 PM
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2001 Isuzu Trooper/ intermittant misfire

Started misfiring one day so I replaced spark plugs, no luck. Then I've had fuel filter, intake manifold gaskets, and #6 coil pack replaced. Also had mass air sensor swapped out with no positive results. Has only shown up on code reader a couple times as intermittent misfire. Any thoughts?
 
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Old 09-09-16, 07:56 PM
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if i remember right this engine had issues with the egr system. it would cause misfires on a coast.
 
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Old 09-11-16, 09:30 AM
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I had gotten a code for the EGR valve about a year ago and replaced it with a used one which seem to solve the problem. Just on a whim, I decided to take it off again and clean it. When I did, I discovered one bolt hadn't been pulled up tight so after cleaning I made sure it was and hoped that an air leak was causing the misfire, but I was disappointed.
 
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