My car started misfiring badly a few months ago and I troubleshooted it to a bad plug wire and the problem was solved when I replaced the wires. It started doing it again yesterday and a the check engine light blinked then came on steady. AutoZone scanned it and said misfire on cyl 2 and 3. I replaced the coil pack for two and 2 and 3 but the problem is still there.
Have you changed the spark plugs... No don't look at them and go, they look ok... change all four and retest. If yes, you already did this then I would start looking into an O.E.M. coil pack and boot kit and then the injector pulse...
The only thing left to replace would be the spark plugs -I would do all the plugs-cheers Denny
SOURCE: 04 Sedona 3.5 cyl #2 misfire replaced coil,back again 5 mos later
How many miles on the plugs and wires? Misfire can be caused by either plugs or wires, after that check the injector for that cylinder. Let me know what u find. Curt
SOURCE: 1998 crown vic police. Had check engine light with
your egr on that side is dirty try cleaning it aslo check intake boltsaround those clyinders.
SOURCE: 1-4 misfire
I'd say you need to replace the 1-4 coil pack. Any changes to the working of the pack have to be tested after the primary source with much more elaborate equipment. The coil pack is easy to replace and will save time and money for testing. Thanks, Dana
SOURCE: 2000 gmc jimmy 4.3L misfire on cyl 4 and cyl 5 at
Clean the egr valve which would cause rough ideling and misfire........Hope this helps u out.
SOURCE: toyota 4 runner 1998, recurring
Hi! Pretty much a PCM (powertrain control module) problem. The PCM has connectivity on all electrical current that runs inside the car including the engine, transmission, accessories, etc. If the PCM is faulty something will surely fail, one good example is the bad reading on the scanner. Please try to swap PCM and see how it goes. Hope this helps and thank you for using FixYa!
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Bad miss at idle?
http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html
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While stop engine idles
like cylinder missing?
http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html
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Engine Misfire codes for
car?
http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?
http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
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Misfire on cylinder 4?
http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html
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Oil on spark plugs and car misfires?
http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html
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This will help.
Thanks.
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