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engine shuddering at highway speeds V70-XC70 1998

posted by  kcookvt on  Sun Mar 30 07:38 CST 2014
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last visit: Tue Aug 5 19:59 CST 2014
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This is weird: the last two times I have gotten on the interstate, my V70 (AWD, 168 K miles) had had an engine issue that I can best describe as a shudder. It is as though it is misfiring. It lasts anywhere between 2 and about 7 seconds. If it lasts about five seconds or longer, the check engine light (which is always on) flashes. The shuddering stops, the light stops flashing, and the car drives fine. This does not happen at lower speeds, and it seems to happen on uphills or flats and after driving at interstate speeds for about 10 minutes. (It happened at the exact same spot on the interstate both times, which I find doubly odd.)

Any thoughts?

Thanks, as always!








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    engine shuddering at highway speeds V70-XC70 1998

    posted by  someone claiming to be bob on  Sun Mar 30 12:00 CST 2014 [RELATED]

    Same thing happened to my 97 850.. Just going up hill at freeway speed.. I changed the spark plugs and no more problems. I think the flashing light indicates fuel is not being burned, that could wreck the catalytic converter.

    Bob,, 2003 v70 72 1800e






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