Question about 2001 Oldsmobile Aurora

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Chnaged coil packs both and still misfire little not much wanna know what it might be

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MISFIRE CAN ALSO BE CAUSED DIRTY FUEL INJECTORS.BAD SPARK PLUGS OR WIRES.

Posted on Sep 02, 2010

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If all the plugs and wires test good then you could have a skipped timing, bad injector(s), or crankshaft sensor giving inaccurate reading but usually that would kill the motor. You might try some quality injector cleaner in the gas. They do get dirty. You could also try cleaning the inside of the throttle body but let it air out before you start it.

Posted on Sep 02, 2010

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1 Answer

What causes engine misfires to stay after new plugs and coil packs?


Try swapping the coil packs around - like swap #1 with #2, and swap #6 with #5, see if the misfires MOVE with the coil packs swapped to the new cylinders or if they stay with the cylinders. If they move with the coil packs, the new coil packs are bad. If they stay with the cylinders, there's a problem with those cylinders. You DID replace that camshaft sensor, right?

Have you checked your #1 and #6 injectors?

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Sounds like one of the coil packs is not on properly, causing the misfire. Is the check engine light coming on?

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Could be the ignition coil. Also could be a compression problem. Work on the misfire then see if the bad sensor goes away.

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97 blazer is missing from take off at 1000rpm to 2000 then clears out code reader says o2 sencor and multable engine missfire


For the misfires, start by pulling your plugs. They either need to be cleaned or replaced if questionable. Then, you may have a bad coil or coil pack. You can test them with a multi-tester-you'll want resistance values that are specific for your vehicle. Alternatively, you can switch the coil packs around (if you know you have a good one from knowing which cylinders are misfiring and which are firing o.k.) If your misfires change cylinder numbers from swapping, you know you had a bad coil. Other possibilities for misfire could be the electronic ignition module or the pick-up coil inside the distributor(if you even have a distrib.)
FYI: code for o2 sensor means that circuit has a malfunction, may be the sensor itself, or a wiring problem. Good luck.

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1 Answer

1996 isuzu rodeo keeps reading #2 misfire runs good xcept when cold it hesitates most times or jus occasionally hesitates then the check engine light flashes and its guzzling gas i only got 50 miles on a...


A misfire alarm typically means the coil pack mounted above the sparkplug indicated in the misfire had gone defective.

To test it, swap the coil pack with another cylinder, and see if the misfire goes from #2 to the cylinder you put it on.

If the misfire continues to be on #2, then consider changing the sparkplugs.

I hope this helps.

May 14, 2011 | 1996 Isuzu Rodeo

1 Answer

How do i know which coil pack is gone in a 2.0 Petrol Audi A4


easy but first i need to know what cylinders are misfiring. then you follow the wires from the coil pack and see which coil powers the cylinders that are misfiring.

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Changed intake manifold gasket and installed new plentum on 1999 buick lesabre. Replaced EGR valve because scanner said bad. I get a intermittent hesitation at excelleration the engine light will flash and...


flash is misfire than steady is fault code misfire can be from anything from air cleaner clogged to mass air flow sensor to pcv valve,vacuum leak etc u already changed egr need to have scanned for more specific code code number breaks down to emissions mechanical and or manufactures specific code

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1 Answer

1997 ford taurus sho misfire cylinder 1


check the wiring connector going to the coil pack. you will probably find one wire corroded going into the connector. Ford sells a connector kit for this repair @ $35..
It will turn on you check engine light. Is it on?
Let us know outocme

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