Question about 2000 Volvo S40

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2002 Volvo S40. Engine revs on its own, both idle and driving. A couple times reved over 5, so turned the car off, which would result in the car not starting for awhile. Any ideas?

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6ya6ya
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Posted on Jan 02, 2017

frostwireguy
  • 46 Answers

SOURCE: volvo s40, loosing power

if you have over 125k miles on it chances are your about time for a new catalytic convertor... can cause a rotten burnt smell... lack of power.. and even a stall... or no start

Posted on Sep 22, 2008

  • 3 Answers

SOURCE: 01 s40 idle air control valve- hard to replace?

your IAC valve, idle air control valve is under the black plastic cover on the front right corner on the engine, remove cover undo valve, renew gasket and re install. ade 13 years volvo tech

Posted on Dec 02, 2008

localwonder
  • 6784 Answers

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Ok, this is a bad motor and you will have to replace this failed motor. this will fix the issue.


Posted on Apr 22, 2009

  • 8 Answers

SOURCE: Hi,Volvo s40 engine revs up to 3000rpm by

Sound like the idle air control valve(IAC) is dodge, could try taking off and cleaning with carb cleaner, while doing that take off hose by throttle body and also clean in there inc butterfly, go and give it a good blast down the motorway !!

Posted on Feb 28, 2010

Testimonial: "Problem solved as suggested,I took it for a good run on the motorway and after about 80 miles it seemed to have settled the problem,Thanks for the info much appreciated Paddy C"

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Hi,Volvo s40 engine revs up to 3000rpm by itself,and will also drop in revs from tick over,then just cut out.Any suggestions would be appreciated cheers


Sound like the idle air control valve(IAC) is dodge, could try taking off and cleaning with carb cleaner, while doing that take off hose by throttle body and also clean in there inc butterfly, go and give it a good blast down the motorway !!

Dec 03, 2009 | 2002 Volvo V40 Wagon

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VOLVO S40 SE 2001RPM HIGH


YOU MAY HAVE A IDLE SPEED CONTROL VALVE PROBLEM, CLEAN IT FIRST, THEN DISCONNECT THE BATTERY, FOLLOW THE PROCEDURE I HAVE ATTACHED.

Here is the most common cause of this stall and idle speed issues, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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I think one of your temperature sensors is gone.

Sep 23, 2008 | 2000 Volvo S40

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