Question about 2001 Volvo S40

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I think it mite be trottle body

Wont start sometimes reving two high for nct

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  • Richard Scordino May 11, 2010

    Clean the throttle body with carb cleaner and check throttle cable for fraying etc that may be limiting its free movement. (not a for sure cure, but a good place to start)

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Vw polo 1 litre has idling problems it keeps reving to around 800 rpm then droping to around 400/500 all the time engine being cold or warm makes no difference. It's a w reg with 50000 miles


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Idle seems to drop to around 250 and sometimes stalls.


it sounds like a idle control valve if you keep your foot on the gas alittle does it stay runningif so does it sound normal if so it probably your idle control valve and to should be on the back of your trottle body also try cleanind the inside of your trottle body with a lint free rag and some trottle body cleaner make sure you open the butterfly and get all that carben out of there sometimes the carben build up will also cause a big drop in rpm.

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holding your feet on the gas keeps the trottlebody open mite be the trottlebodysensor

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2 Answers

HIGH IDEL


sometimes the gasket under the trottle body goes bad. spray carb cleaner at the base of the trottle (not down into it) body while the engine is running. if the idle changes your on the right track. its an easy gasket to change.

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