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Quick accelleration causes the engine to die. Engine idle will not increase with adjustment to idle screw.

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  • Cars & Trucks Master
  • 11,082 Answers

What make , model and year vehicle ? The idle on most vehicles are controlled by IAC - idle air control valve , by PCM - engine computer .

Posted on Dec 17, 2016

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Posted on Jan 02, 2017

emissionwiz
  • 75108 Answers

SOURCE: nissan ga15 engine idle adjustment locations

The idle speed is computer controled, it is not adjustable, you most likely have sludge in the throttle valve and the idle speed control air bypass valve, clean them with carb spray with the engine running.

Posted on Sep 17, 2008

  • 119 Answers

SOURCE: fuel system

Check the fuel system, chenge fuel filter. clean the fuel tank.

Posted on Oct 19, 2008

  • 1 Answer

SOURCE: '04 Mazda3 had very low engine speed during idling

I have encountered this problem also, try changing your battery. My battery lasted almost 4 year till it was the cause the shot my alternator.

Posted on Apr 10, 2009

  • 1118 Answers

SOURCE: engine sputtered, then died. Towed home. I

Might be fuel pump, or filter is pluged up, best to chg. filter and then do a fuel pressure test.

Posted on May 03, 2009

  • 1 Answer

SOURCE: 2001 Toyota 4runner idle rpm is too low

Hi Seanmcm21,
More than likely the low idle you are experiencing is caused by a dirty IAC valve located right under the throttle body itself. It needs to be cleaned out with carb cleaner. Remove the electrical connector, the two vacuum hoses, and two screws. To put it back, use a little sealant to seal it before screwing it back together but do not get the sealant inside the IAC valve. If this 4 Runner is a V6, you may need to replace the spark plugs if old. Make sure to purchase twin electrode NGK or Denso spark plugs and gap them to .043 with a gapper.

Posted on Jan 31, 2010

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1 Answer

Where is the idle screw located on a 1999 Saturn need to adjust the idle..Still trying to find out why car will not stay running


There is no screw to adjust the idle , the PCM - engine computer controls the idle with the use of IAC valve , Idle air control valve ! The Base idle is set at the factory an you need not try to adjust it ! You will cause running problem an the check engine light to come on . Try cleaning the throttle plate and the idle air control passages .
Throttle Body Cleaning To Restore Idle Quality
How to Clean Throttle Body and Idle Air Control IAC Valve Quick and Easy

Jun 06, 2017 | Saturn Cars & Trucks

1 Answer

86 gmc k1500 5.7L just replaced carb and now cant get engine to idle


Check that you have replaced the vacuum line for the distributor to the base of the carby block. Turn the 2 idle mixture screws all the way in till they touck the bottom. Then turn both out about 2 full turns . Get the engine running and hold at fast idle and adjust screws until a steady idle is achieved . Allow to idle and screw each screw in or out slightly until even idle is achieved. You will hear the engine revs increase or decrease when you have gone too far so adjust to about the middle of turns

Feb 17, 2013 | Cars & Trucks

1 Answer

My truck starts and stalls and will not idle


Try increasing the idle speed. If you don't know, this is how to do it.
Open the bonnet and ask someone to push and release the gas pedal a five second intervals.
Observe which part is moving.
Yo will see a small adjustment screw on that lever. You will understand that by adjusting the screw you can increase the gas supply to the engine.
Slowly rotate the screw while the engine is running. (If the engine doesn't run in idle state as you have explained, ask someone to keep the pedal slightly pressed. After increasing the gas supply, ask the person to release the pedal).
Adjust it further to get a smooth running condition at idling.
Also check whether air cleaner is blocked.

Aug 30, 2011 | GMC Sierra 1500 Cars & Trucks

1 Answer

The vehicle engine is shut off immediately when you release the acceration pedal


PROMLEM MAY BE BECAUSE LOW IDLE SPEED ADJUSTMENT. INCREASE THE LOW SPEED/ IDLE SPEED BY INCREASING THE FUEL INTAKE . IN CARBURATOR VEH. ADJUST THE IDLE SCREW CLOCKWISE. IF IT IS FUEL INJECTOR INCREASE THE FUEL AT PUMP ITSELF.

Nov 19, 2010 | Isuzu i-280 Cars & Trucks

1 Answer

My audi 80 starts idles for a few minuets and then dies unless i pump the gas harshly.As soon as I take my foot off the gas it dies.I've checked airfilter,sparkplugs,rotor and distributor cap.No luck...


There is a screw near the throttle body on the upper left corner of the engine, if you are looking at it from the bumper. This controls your idle speed. Over time this screw can move and may need re-adjustment. After turning the screw SLIGHTLY to the right, you should increase your idle speed to just over 1000 rpm. Then your problem should go away.

Jan 01, 2010 | 1991 Audi 80

2 Answers

How to adjust air fuel mixture on a 87 suzuki samuria


On any carburator,one screw is for the idle speed, the other the air/fuel mix.Start the engine and let it get plenty warmed up. Adjust the idle screw to make the engine run slow. Turn the air/fuel screw in until the engine starts to die then out till it starts running loady.You want the screw between these two locations. Adjust it till the engine runs the fastest. Now adjust the idle speed screw to about 1000 RPM.
I hope this helps you.

Sep 24, 2009 | 1993 Suzuki Samurai

2 Answers

Idling


The mechanic should check the Idle .If the Idle is stock then repair then or adjust the Idle .When It does not Idle, It means that the Idle is been stuck or its been tight or the Idle screw or bolt is been tight that causes the Idle not to move .You should loosen the Idle a little until you could arrange the Idle until it will Idle normally .When its not Idle when selecting gear. You should adjust the Idle until the car engine will not stop. and that the car can run while selecting gear.

Sep 05, 2009 | 1991 Honda Accord

1 Answer

The engine rpm's increase when the engine gets warm.


spray a samll amount of either near each vacum line connection if the rpms go up theres your leak!!

May 30, 2009 | 2005 Mitsubishi Lancer

1 Answer

Carburator tune up of charadade 1992 sedan. The engine is running too fast while idle at 1200 r.p.m.


Before you start check the status of your choke. One that is stuck on will cause a high idle. If the choke checks out, proceed to the following:


You should have what's called a 2 needle carburetor. A larger screw adjustment for idle, and a smaller for high speed.

Start by adjusting your low speed (idle) needle until you reach the desired idle. I prefer about 850rpms. Do this with the engine running and adequately warmed so that your adjustments are not thrown off by the automatic choke.

Next slowly open up the high speed needle. As you open it your idle speed will gradually increase. Adust it in 1/8 turn increments, pausing after each adjustment to allow the changes to take affect. Keep opening it until you stop increasing your rpms, then take it back 1/8 of a turn.

Next readjust your idle mixture screw so that your idle is back down to 850rpms.

Apr 29, 2009 | 1992 Daihatsu Charade

2 Answers

1988 F-250 460 engine stalls when dribing down the road


On older, carbureted engines, cold stalling (and hard starting) is most often due to an automatic choke that is sticking, misadjusted or broken. Cleaning the choke mechanism with aerosol carburetor cleaner may free up the choke allowing it to work properly again. If the choke housing as an electrical heating element, the element may not be receiving voltage when the key is on, or the element may have burned out (check resistance with an ohmmeter).

Other causes of stalling with a carburetor include an idle speed adjustment screw that is set too low (turn screw to increase idle speed rpm). The engine may stall if the idle fuel mixture screw(s) are not adjusted correctly or the idle mixture port(s) are dirty or clogged with fuel varnish deposits (clean the carburetor and readjust the idle mixture screws for smoothest idle). Stalling can also occur is there are vacuum leaks in the carburetor, under the carburetor (bad base gasket), or any vacuum hose connections to the carburetor or intake manifold

Jun 22, 2008 | 1988 Ford F 250

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