Question about 2002 Volvo V70

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Cylinder 3 misfire

I have rough idle and car shakes at acceleration. I originally had Cylinder one misfire, but after troubleshooting with new coils and spark plugs crrected the error. However, now have cylinder 3 misfire. New coil (has spark), new spark plug. Does anyone have a reccomended next step?

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Posted on Dec 12, 2012

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Posted on Jan 02, 2017

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  • 167 Answers

SOURCE: volvo 960 missing ciylinder

I would be doing a compression test as well.

Posted on Jun 28, 2009

rickmarti817
  • 214 Answers

SOURCE: Car is idling rough all coil packs have been changed along with spark plugs

Dont get another harness. If you are using Autozone supplied coil packs, the problem is most likely the coils from Autozone. I have went through this exact same thing before. I changed the coild because one had a burn mark on the boot between the plug and the coil pack. I noticed it when changing spark plugs. The new coil from Autozone made the vehicle struggle on take offs and idle rough and the vehicle had no power. I installed another coil from Autozone again which was supposedly a better model and costed more. The vehicle ran a little smoother but the rough idle and small misfire was still there. I installed another coil from the dealership and the problem was fixed immediately.
I also replaced one of the coil connectors for a different cylinder but only because i broke it when disconnecting the coil packs to remove the spark plugs.
And when I installed all my coils and the new one from Autozone, I used dielectric grease on all the connectors. But the rough idle and power loss was immediate following installing the new coil from Autozone.
Beware if you are using coils from another part store because many part stores get their parts from the same source.

Posted on Jul 19, 2012

  • 28 Answers

SOURCE: 1999 Volvo S80 T6 Engine Misfiring

some weeks ago i had similar problems with my 2001 s60,i cleaned the etm and fitted a front o2 sensor ,its now idling at around 800 and driving fine.You could try changing the o2 sensor-but remember the earlier etms are troublesome and it may be a big part of your problem,the cleaning can work in only some cases

Posted on May 04, 2009

  • 1 Answer

SOURCE: ENGINE MISFIRE AND SHAKING

check your wire harness on the top of the engine. Volvo must have bought harnesses from Mercedes. The insulation just cracks and disintegrates, then the wires short. Not good for an ignition system.Once they short It can fry the circuit for that cylinder in the computer. Does not set a code other than Misfire.

Posted on Jun 16, 2009

Mustgo
  • 2359 Answers

SOURCE: Misfire on #3

Re: 2000 Volvo S40 L4 1.9 Liter L4 1.9 Liter Turbo FI

Are you consider yourself a handy person?

Swap the coil and see is the misfire going to follow to another bank of cylinder.

You has total of 3 coil in your engine.

Do a detail record map and switch the two coils.

A replacement aftermarket coil is oil $46 w/one year warranty and $55 will get you a life time warrent coil.

Do the swap and see what happen.

A leaky/failing injector can also cause the same problem.


Do a Chevron Techron fuel injector clean ran and highway ran.

Good luck

Posted on Jul 15, 2009

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