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Volvo AWD V70-XC70 Forum

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Connector repair V70-XC70

posted by  Robert S. on  Mon May 27 07:26 CST 2024
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last visit: Sun Sep 21 05:48 CST 2014
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Not the same Robert who is well-known for his DIY videos. I view them often.

I'll try Penetrox A.

My 2000 V70's particular issue is a random misfire which will always occur in Cylinder #3. The car will run fine for hundreds of miles, then out of the blue will trigger the CEL and run rough with a #3 misfire. I will unplug the #3 coil receptacle housing, remove the coil, reinstall the same coil or swap with a spare, and #3 fires again normally. Problem will randomly repeat later.

The #3 coil connector has been repinned into a new receptacle housing, new #3 coil wires spliced in along the top of the cylinder head, and grounds checked. Have also removed and reseated the ECU.

I have no logical explanation why the #3 random misfire occurs. It's especially mystifying when simply unplugging, removing and reinstalling the #3 coil will solve the problem until a few hundred miles later when it will happen again.







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New V70 with 215K appears to misfire [V70-XC70]
posted by  Rolyak  on Thu May 9 08:36 CST 2024 >


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