Question about Volvo S40

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At a stop the car revs up and down between 300 and a little above 1000 and driving it accelerates on its own and doesn't want to stop sometimes

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  • Contributor
  • 30 Answers

Please check out for the ideal sensor

Posted on Oct 20, 2013

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 104 Answers

SOURCE: 2004 stratus 2.7L Erratic idle, sometimes dies, sometimes revs at stops

hey-I have has this before different car but same - idle control valve is failing - computer at shop will pick this up on diagnostic

Posted on Oct 12, 2008

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SOURCE: When I Accelerate, the car does not!

transmission problems you may be low on fluid or it may be going bad

Posted on Jan 24, 2009

ryan7896
  • 31 Answers

SOURCE: Acceleration - cannot get above 40 miles per hr.

If the engine revs up while in drive and running at 40mph, your transmission is probably slipping. Try checking your transmission fluid level. If it is OK, I would get it by a garage to have them look at it to cofirm.

Posted on Mar 31, 2009

Mr BrokRench
  • 1623 Answers

SOURCE: engine revs but car doesn't accelerate

Since you did not say what type of transmission you have i will suspect the clutch is slipping if it's a manual.
If it's an automatic, it could be several things. Low fluid level...clogged filter, fluid needs to be changed..transmission serviced...weak pump, bands/clutch packs worn...etc
Good luck..i hope this helps, please rate me a fixya.

Posted on Jul 29, 2009

AskJack
  • 117 Answers

SOURCE: engine idles up, down and low while under 1000 rpm

It is the ISC motor, (Idle Speed Control) it costs around $30.00 and can be found at most automotive stores. If standing in front of car looking at engine, it is located near the front towards the left. Your throttle cable is connected to it. There are four small screws that hold it to a bracket, pay attention to the rod with a small dial type wheel sticking out the end and you will see it go in and out of that motor casing. Your's is sticking. replace that and you should be good to go.

Posted on Aug 26, 2012

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