Question about 1996 Mitsubishi Galant

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Car stalls slowing to light or stop sign takes off and on highway is fine replaced the iac valve 3 times and keeps going bad please help

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IS THE IAC MOTOR GOING BAD OR IS IT NOT BEING COMMANDED FROM THE PCM? THE CAR SHOULD BE DRIVEN WITH A SCANNER ON IT TO VERIFY IAC OPPERATION AS WELL AS OTHER COMMAND ISSUES THAT MAY NOT BE RESPONDING

Posted on Oct 12, 2010

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Posted on Jan 02, 2017

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88' sundance efi stalls at stop lights and signs, also when having to slow down to make a turn. seems to run fine all other times.


Remove and clean IAC ( idle air control ) motor and port it comes out of with throttle body spray cleaner , then retry it. If that cures it for a while and it starts to act up again, replace the IAC motor.motor1258_10.gif

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Engine malfunction light on all time drives ok but when stop at traffic lights etc ref counters go down and stalls


IAC problem . You have a problem with you idle air control valve. So when you stop at a stop sign the RPM goes to low and you stall out. IAC controls the desired speed necessary to keep the engine running.where is this sensor at is at the rear of the engine compartment under the thtottle valve. Here is what you need to inspect for. If you have a vacuum leak in you engine system, the IAC cannot compensate or control and you get rough idle. Check any loose vacuum connections .

Apr 26, 2011 | 2006 Ford Focus

1 Answer

2006 Envoy stalling when idels and won't stay running


Clean your Throttle body and pay attention to the Idle Air Control (IAC) valve passageway to try to clean the IAC. A dirty or faulty IAC will cause your engine to stall at idle, the job of the IAC is to open the passage way through the throttle body to regulate the amount of air to enter the engine to keep it from stalling when the Envoy is at idle.

Start with the simple and clean the throttle body and inspect any loose or damaged wire leads to the throttle body. Replace or repair any signs of damage.

Thank you for using Fixya and good luck.

Apr 10, 2010 | 2006 GMC Envoy Xl

1 Answer

My car runs great with absolutely no problems when i keep the zccelerator on, but when i slow down to a stop, the rpm drops to about 500, sometimes konking out, other times it will slowly creep back up to...


The idle air control valve is what regulates incoming air when the engine is idling. In some cases these can malfunction and cause intermittent issues with stalling at idel until the IAC dies altogether.

Jan 04, 2010 | 2002 Volvo S60

2 Answers

1995 jaguar xj6 stalls once you stop at the stop signs


Look for an IAC sensor (motor) Idle Air Control.
Usually located on side & front of throttle body. Not 100% sure which type you'll have but if you have pintle type (pointed end) Remove it, spray it well with throttle body cleaner as well as port it came from, and retry. If it cures it temporarily & starts to do it again, replace it.

Aug 21, 2009 | 1995 Jaguar XJ6

1 Answer

Truck dies when i stop or slow down


this may be the cause, try it and see if it helps, it is a very common cause of problems like yours.
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.

Mar 03, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Truck dies when i stop or slow down


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 17, 2009 | 2003 Dodge Durango

1 Answer

Engine kills when engine warm


You need to replace your IAC (idle air control valve). The IAC, like it sounds, control the idle of your car. When they go bad they will cause the low idle and stalling. The IAC is located on the throttle body and is usually held on with a couple of screws. It is an easy relatively cheap fix that you can take care of by yourself. Let me know if you have any more questions. Thanks for rating my response and for using FixYa!

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2 Answers

1996 Camry 100 km stalling


You have one of two very common problems.
Number one may be a stuck open EGR valve
Number two would be a failing Idle Air Control valve (IAC).
Try this: Open the hood & locate the EGR valve, close to the firewall, behind the intake. Find & take with you a small hammer. The next time that it happens, open the hood & tap on the EGR valve. If it is sticking "open" the tapping may dislodge the carbon particles that are keeping it open.When the EGR valve is open, exhaust is getting into the intake at idle, and this will def stall out the car.
There is no repair to the IAC valve, it would need to be replaced if it is bad.
One of these two scenarios will cure your problem, I see it every day.

Oct 07, 2008 | 1994 Toyota Camry

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