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Old Jun 17th, 2019, 11:30   #11
oliverpervasive
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Last Online: Feb 4th, 2021 15:56
Join Date: Jul 2008
Location: london
Default S40 revs up and down at idel

Just a FYI - I have a S40 X reg auto petrol.

I had revs going up and down at idle - I could feel it through the steering wheel.

On investigation I found one of my vacuum hoses had come disconnected from the air filter (- goodness knows how as its well supported/connected) - shoved it back in and hey presto - back to normal running.

Im just saying its worth checking your vac hoses first before starting to dismantle things.

Mine was the one from the rear of the air filter.
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