4 replies to this topic

[rcaddell]

Corss posting form my thread on V70R.com :

Have an issue with my 2000 V70r. Once the engine warms up, the idle gets VERY rough. Almost to the point where you think it is going to stall. Car starts running rich. Once moving, all seems fine. Recently did the PCV system and 02 sensors. Rechecked for vac leaks, none to be found. If I unplug the maf, idle shoots up as normal, engine smooths out for a few seconds, the starts running rich and idling poorly again. Only trouble codes are for front o2 and upper fuel limit. Any ideas? On the verge of walking away from it and getitng something newer. Thanks

[brad850]

Check the vacuum line going into the passenger side of the intake manifold.

ahh I just realized you said you have a v70r. If there isn't a vacuum line there disregard my post lol.
But if there is check it. Mine was unplugged and I had the same exact symptoms.

[Keaton85]

it's on 00, not a 98! there is a vacuum line in that area but it doesn't fail like the 94-98 series does.

You either used the wrong O2 sensor, the splice went bad,or you have a vacuum leak.

[rcaddell]

Going ot recheck for vac leaks this weekend. i used an O2 from FCP, perhaps I should just get one form volvo

Thanks!

[Honeyman]

Displaying similar symptoms, my issue was a bad seal between the charge-air tube and the ETM. I had folded the lip upon re-install. The PCV work leads me to believe it is vacuum related....fwiw.