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Coil pack loose

Would a loose coil pack cause misfiring

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

keeperoffire
  • 106 Answers

SOURCE: 2000 Ford Expedition EB runs rough and begins to shake and stall

I personally would start with the one that runs cylinder #3 and then take it from there.

Posted on Mar 09, 2009

  • 5 Answers

SOURCE: 2003 Chevy Venture misfiring

The injector is a good possibility, although you should check for spark in the wire first, as the electrical is the weakest link in the system. Put a spare plug in the end of the wire with the plug resting on metal, then have someone crank the van to see if you have spark that far, test and replace spark plug, (do not get shocked!) then look into a new injector or a good cleaning.

Posted on Jul 17, 2009

  • 144 Answers

SOURCE: 2004 Audi A4 misfire

it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps

Posted on Sep 03, 2009

  • 819 Answers

SOURCE: I have a 2002 TrailBlazer with the straight

did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
?

Posted on Feb 28, 2010

  • 3600 Answers

SOURCE: number one cyl on coil pack not firing, all others

Check the spark plug first. then if the plug is good you wil need a digital ohm meter to test the coil pack. if you need to know how to remove the coil pack let me know, to test put on ohms should not have more than 2 1/2 ohms restance betweent coil lead to coil connector. If you test the coil pack on both sides of the pack and get a reading then the coil is bad, if it does not read then you haave a bad fireing plate diode.

Posted on Mar 12, 2010

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1 Answer

2006 fusion running rough dealer put in new computer car misfire on 4,5,6..replaced plugs and coil packs car still misfire on 4,5,6


does mil light come on if so what are codes?
Could be ignition related. SOmetimes the coil packs do not tighten down all the way causing them to be loose which can result in misfires.

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Just because the coil is firing doesn't mean the coil is operating correctly. As far as the connectors rockauto.com has a good selection of connectors to be spliced in

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Can catalytic converter on 98 Pontiac grand prix cause misfire on cylinders in car


No, a plugged converter would cause the engine not to breathe properly. Too much back pressure would stall the engine or make it run very poorly. It would not be local to any one cylinder-all of them would be affected.

To diagnose a misfire in one cylinder, well, you start at that cylinder. It could be ignition related- the spark plug and spark plug wire for #6, possibly the ignition coil for #6 in the coil pack for the engine. (A v-6 would have 3 coils in the coil pack, one coil for 2 cylinders.) It could also be fuel related, so the fuel injector for cylinder 6 should be considered. And the last reason for a misfire is usually the most expensive repair: low compression in #6. This may be a head gasket problem, or a piston ring problem, or one of the valves for #6 may not be sealing well, causing low compression and the resultant misfire. The engine computer codes a misfire when it senses low power output from that particular cylinder. The misfire causes a lag in crankshaft rotation, and the crankshaft position sensor senses it.

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1 Answer

What causes a 1994 Chevy Silverado 2500 with a


that would be bad coil packs ,try switching coil pack cylinder 3 with 4or 5 and see if miss fire code changes if it does it's the coil pack .or its possible where they plug in at the bottom(there should be a small oval rubber gasket on coil pack to keep out corrosion or possible not making a good connection (loose) ,oil getting in there ,you can use a timing light to narrow it down faster, pull your plugs for those cylinder and inspect for damage or fouling.and lastly check your wires if any brakes or crakes and that they fit on plugs tightly.

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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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1 Answer

Bravada coil


The GM products such as the olds bravada has a problem with oil getting into spark plug area where the coil pack is bolted down, the coil pack and plug are emerced in oil and causing the coil pack to misfire..to check this have the codes read to determine what coil pack it is..and remove it by removing the bolt holding it in place..if there is oil it will be right there to the top in many cases. Take a paper towel or something to sponge the oil out and clean the spark plug connector, no need to remove the plug and replace the coilpak with a new one...this is a problem but not real serious..suggest removing the other good coils and clean the plug area and plug Then replace the good ones..or if you wish replace with new...oil is from valve/cam shaft cover gaskets bad or loose..you can try and tighten the securement bolts or have a garage mechanic take a look...good luck

Apr 08, 2013 | 2002 Oldsmobile Bravada

3 Answers

Misfire code#306


cylinder #6 is misfiring check plug(if gap incorrect can cause misfire, fouled etc) , coil on plug (or Wires) poss spark plug coil pack (check for cracks and heat damage in insulation of pack)

Oct 20, 2009 | 1996 Ford F150 Regular Cab

1 Answer

2004 Audi A4 misfire


it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps

Jul 28, 2009 | 2004 Audi A4

1 Answer

1997 fordexplorer 5.0 awd #3 misfire


Change the coil that's the only thing you did not change and a coil if it's weak will cause a miss fire. You can do a compression check on #3 also. If timing was out the truck would be missing like crazy. Change the coil pack.

Mar 26, 2009 | 1997 Ford Explorer AWD

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