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Check Engine Light on, flashing intermittently. Rough running XC90 2004

posted by  Robert S. on  Tue Jun 19 09:33 CST 2018
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last visit: Sun Sep 21 05:48 CST 2014
[RELATED]

2000 V70 SE - AW5 - Denso - 250K miles

By coincidence, I'm in a similar situation on a road trip. Cruising at 70 mph and the CEL illuminated - started running rough; CEL sometimes flashing, sometimes not. Drove 25 more miles to destination and spent the night.

No scanner on board but have tools, spare plugs and ignition coil. In the hotel parking lot this morning, isolated the dead cylinder, swapped out the coil and the cylinder was still dead. Pulled the plug (just coming up on 20K miles), swapped with a used spare plug, and the engine is now firing on all cylinders.

The CEL is still on. Will it go off after driving a bit? Really don't want to disconnect battery to clear codes because of computer stored mileage, fuel consumption figures, etc. But I will disconnect later if needed. For now, continuing the trip this morning.

Thanks,






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