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Car idles up and down when sitting still, runs

Car idles up and down when sitting still runs fine when driving.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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emissionwiz
  • 76164 Answers

SOURCE: rough idle

Have you had the throttle valve cleaned?

Here is the most common cause of surges and stalls, 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.

Posted on Nov 12, 2008

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SOURCE: 2001 Saab 9-3 was driving

take the vehicle to your nearest saab dealer and ask for a diagnostic scan, yuo have a sensor failure, if left it could be expensive.

Posted on Dec 20, 2008

landsend
  • 1066 Answers

SOURCE: 2002 Kia Rio runs rough when idling

well spend some change and have a simple tune-up.  Plugs and filters and readjust the idle.

Posted on Apr 01, 2009

  • 1 Answer

SOURCE: Car runs rough and misfires

if u checked the codes and it showed that a o2 sensor is bad make sure ur on the rite one as in {sensor 1 bank1 or sensor1 bank 2} when u change a sensor always make sure u got the rite one.


hope this helps

Posted on Apr 21, 2009

  • 9 Answers

SOURCE: 2001 LINCOLN LS V6 - ROUGH IDLE / SOMETIMES STALLING.

Very common problem is about a dime size hole wearing in the rubber elbow on the PCV valve located on the driver side rear of the intake manifold.

Posted on Oct 13, 2009

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1 Answer

1996 mercedes c280 dies when put in drive


Engine stalls or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Oct 15, 2012 | 1996 Mercedes-Benz C-Class

1 Answer

Idle drops way down in drive gear in park it's fine or running the A/C


what car is this, could be normal or not depending, like my 73 nova dogs down when put in gear but its suppose to with a 3 speed turbo. if its a newer car its not. and would sudject checking transmission fluid/filter or even replace both. if your fuild is low or old the transmission wont slip as easy and will make you car work harder to idel while sitting still.

Jun 08, 2012 | 2004 Dodge Neon

2 Answers

1997 nissan silvia


If it idles rough at a stop light or sign, or in park but runs fine above 1000 - 1500 RPM my guess is gonna be a vaccum leak. very very common, check near your charchol canister.the leak it-self sounds like a whistle but the car usually sounds like a cammed out hot rod. spray carb cleaner around the engine and listen for an increase in idle speed. if the car idles like that and has lack of power, check that your spark plug wires arnt sitting ontop of the engine and have melted or heated up enough to wear down to allow a spark to jump through to the block instead of the spark plug. NOTE* do not inspect with the engine running you runnthen possibility to get shocked.

Nov 28, 2011 | Nissan Cars & Trucks

1 Answer

Car idles up and down when sitting still, runs fine when driving.


Have the vacuum hoses inspected for leaks or loose ones. You may have a dirty or bad idle control valve. Cleaning the throttle body may also help.

Mar 20, 2010 | 2001 Cadillac DeVille

1 Answer

Rough idle then stalls


Vacume leak or bad idle motor. With the car in park and running with the hood open listen for leaks moving your hand around the different hoses looking for a change in the sounds that you hear. The idel motor also makes the car idel up to 1500 RPM or so right at start-up then idel down, If it doesn;t the idel motor is likly. Check engine light is on when running? Test for codes, Follow code test charts don't skip any steps!.

Nov 02, 2009 | 1998 Chevrolet Malibu

1 Answer

1992 dodge spirit with codes 12,25,33,51 the problem im having with the car is that its idling really high, sounds like a jet engine. It used to do this then when left idling it would idle down and drive...


The problem is the idle air control solenoid. If not that there is a vacuum leak somewhere in the intake. It's getting too much air in other words. Hope it helps.

Jul 19, 2009 | 1992 Dodge Spirit

1 Answer

Motor bogs and wants to die when i stop with the a/c on.


What it sounds like you need to do, is adjust your BISS screw, its a little screw usually covered by rubber, sometimes not, it sits on top of your throttle body, and it adjusts how much air your car sucks when its at idle, if you adjust it for more air while idling, it should fix your problem that you described. You can use a flat head or a philips screw driver to turn the screw.

Jul 13, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

Car starts fine..Idle is fast...stalls after car warms up


Check for vacuum leaks. Also try cleaning the ISV.


If that doesnt work go to vwvortex.com and post your issue there

Jul 08, 2009 | 1989 Volkswagen Golf

2 Answers

2002 Kia Rio runs rough when idling


well spend some change and have a simple tune-up.  Plugs and filters and readjust the idle.

Mar 14, 2009 | 2002 Kia Rio

1 Answer

When in park or idle it jerks back and forth


It sounds to me like you may have a blown intake gasket, which is very common on the 3800 V6 engines used in these cars, as for your power steering, the resevoir is located bellow the alternator on the back side of the engine ( it will be directly behind the pulley driven by the drive belt)

Nov 24, 2008 | 1996 Oldsmobile 88

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