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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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1997 V70r really rough idle and surge on startupViews : 1521 Replies : 22Users Viewing This Thread : |
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May 8th, 2024, 12:32 | #1 |
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1997 V70r really rough idle and surge on startup
My V70r surges at high revs on starting, then settles into a really rough idle at low revs, almost stalling point.
On acceleration or at speed, it's fine, but as soon as I take my foot off the gas or come to a stop, the rough idle returns. It even cut out the other day, going downhill, which was scary. It started doing this fairly recently but seems to have got worse. No warning lights on the dash. Any ideas? I read something on another forum about vacuum lines causing poor idling but not sure what I'm looking for. I had the battery out recently and had both O2 sensors replaced last week but I don't think that should affect it(?) - I've had the battery out before with no problems. EDIT: a couple of times I noticed the brakes felt 'weird' - I had to push on the pedal more than normal to get effective braking. They worked OK but weren't as 'instant' as usual. However, that was on 2 or 3 occasions, most of the time they felt OK. Could be connected to the other issue? Don't the brakes have a vacuum link?
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Saffron Volvo V70R 1997 2.4 Auto Last edited by Yog Sothoth; May 8th, 2024 at 13:42. |
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