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Car running rough at random when accelerating and also idle drops suddenly when slowing down and often completely stalls out when I stop. Smells strongly of gasoline when it stalls/almost stalls but I

Starts fine, will drive for a few mins fine then just start accelerating rough and then 80% of the time I am slowing down or stopping it will start shaking and smelling like gasoline then if I come to a complete stop it will often stall out completely or drop to 400rpm and then idle back up to 600/700rpm

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  • Scott Higby
    Scott Higby Feb 13, 2014

    Subaru Legacy GT 1999

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  • Subaru Master
  • 15,639 Answers

This could be a lot of things. one of the tests that you need to run is shift it into nuetral when you are stopping and see if it still drops RPM and wants to stall. This will eliminate or conclude that it is a transmission issue. If it is still doing this then it could be a vacuum leak or fuel delivery issue.

Posted on Feb 13, 2014

  • 1 more comment 
  • Scott Higby
    Scott Higby Feb 13, 2014

    Hi, I just went for a short test drive and if I switched into neutral after coming to an almost complete stop in 2nd it did not change although it didnt fall below 700ish or stall whatsoever, but if I changed into neutral from 3rd gear while slowing down the rpm would just move between 900/1000 right through until I have stopped and taken off again

  • Brad Brown Feb 13, 2014

    The problem is the torque coverter clutch is not releasing. The issue might be the converter itself, or a bad solenoid.

  • Scott Higby
    Scott Higby Feb 17, 2014

    It is a manual sorry mate. Today it just started to shudder and is quite rough on picking up speed

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6 Suggested Answers

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Posted on Jan 02, 2017

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hi99ins
  • 123 Answers

SOURCE: 88 dodge dakota has rough idle and stalls at slow down.

Change/thoroughly clean the idle control solenoid. It may be sticking and causing rough idling.
Cleaning it is unlikely to be more than a short-term solution.

Posted on Jan 07, 2009

adhamsaid88
  • 58 Answers

SOURCE: 1994 Sentra running rough

thanks for asking , i am sorry to tell you that the problem you asking for could be for a lot of reasons , but , i will try to help you by tell you some things to check it , first you should be sure that the car is not over heated , and and the sparks are good , and all the cylinders are working properly and that by removing each spark wire but every one separately and see if any change happen ,if no change happen with one of the sparks so you found the problem and it is that you r car don't work with all it's cylinders , but if that will not be easy for you to do it your self , so be sure that if you driven the car to a local garage no damage will happened , and don't worry that shouldn't cost you a lot of money , and thank you for using fixya.

Posted on Jun 26, 2008

emissionwiz
  • 76109 Answers

SOURCE: low idle stalls out

Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) 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 Mar 13, 2009

66 chrgr
  • 1011 Answers

SOURCE: shuddering then stalling when stopping

have your idle air control solenoid cleaned out!

Posted on Jun 16, 2009

thunderalley
  • 432 Answers

SOURCE: car stalls when you slow down for a stop, wont stay running idle

fuel filter most likely

Posted on Sep 24, 2009

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1 Answer

What would cause my idle to be all over the place the car will not adle smooth it is either to high or it will act like it will stall and it smells like it is flooding when it almost stalls .


Here are the most common causes of idle surge, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) 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

Oct 04, 2017 | Cars & Trucks

2 Answers

Idles roughly, then low when stopped or in park, then dies. Decreasing gas mileage. Slow to accelerate


Sometimes that's caused by a vacuum leak near the manifold area.

Sometimes air in the coolant will cause an idle problem. Air will keep the air temp sensor from sending proper info.
Hope this helps.

Jan 03, 2014 | 2004 Ford Taurus

2 Answers

I have 1999Chevy suburban with 6.5 turbo diesel motor.it idles up and down and when driving the gas pedal is real touchy Wat is the problem and were do i locate the problem


Check the help links related to this problem.Click the link below to go through its troubleshooting procedure :-----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html---------
Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
-------Complete loss of brake pedal then all gets normal? http://repairhelpcenter.blogspot.com/2012/01/complete-loss-of-brake-pedal-then-all.html
------Car dies when gas pedal is pressed? http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html
--------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down?

http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html

---------

After replacing brake rotors and pads, brake pedal remains on floor? http://technoanswers.blogspot.in/2012/02/after-replacing-brake-rotors-and-pads.html

---------

accelerator pedal sensor? http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

-------

For rough idle issues and problem troubleshooting,go through the help links provided below :----- van idles rough?

http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html

---------
will not idle when cold?

http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

----------
runs lean and idles rough?

http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html

-----------
Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

------------
Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

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Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

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Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

This will help.

Thanks.

Mar 01, 2012 | 1999 GMC Suburban

1 Answer

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Hello... Where to go next depends on how the Evap Gross Leak was fixed... Post it...

Thx.

Jun 16, 2010 | 2001 Dodge Durango

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After stopping at a light, the lights dim and the


it might be time for a timing belt it often gets neglected. most need changed every 50 or 60 thousand miles

Feb 24, 2010 | 2001 Dodge Neon

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1994 Chevy Cavalier, stalling when in gear.


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May 06, 2017 | 1997 Chevrolet Cavalier

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1997 2.2L base Cavalier idles rough and randomly stalls


Have they checked your TPS sensor as this is the most common cause for rough idles and stalls...

Aug 21, 2009 | 1997 Chevrolet Cavalier

2 Answers

Low idle stalls out


Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) 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.

Mar 13, 2009 | 1989 Audi 200

1 Answer

Unstable RPM - is this also a safety issue??


yes here is the common problem

Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) 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.

Feb 15, 2009 | 2000 Isuzu Trooper

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