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HESITATES AT WHILE IDLING

WHEN COMING TO A STOP LIGHT WAITING FOR THE LIGHT TO CHANGE IT SEEMS LIKE THE CAR IS ABOUT TO STALL BUT DOESNT. THE RPM DROPS A LITTLE BUT GOES BACK UP WHEN I DRIVE

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Clean your idle air control(iac) valve. Most iac valves are located by the throttle plate. Clean it with carb cleaner. You can remove it for cleaning, be careful not to damage the gasket.

Posted on Apr 23, 2014

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Why does my Fiesta stall while idling all the time?


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The car hesitates when idling or stopped at light/ stop sign, and the rpm drops to zero then goes back up.


The battery was a red herring - it would not have anything to do with the problem.
Faulty spark plugs could cause a miss but probably not make the engine stall.
What you described is a classic example of a faulty idle air control valve or a dirty throttle body. The computer controls idle speed by regulating how much air enters the intake. It opens the control valve to raise idle speed when necessary.
I would check the control valve and the throttle body.

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Every time my car comes to a red light it powers off.why?


EGR (exhaust gas recirculation),or TPS (throttle position sensor) When the vehicle makes a stop and go into idle. The RPM is basically too low to maintain the RPM, If the vehicle runs 800 RPM in park or neutral and doesnt stall the setting is correct. If it stall in neutral or park and has a hard time accelerating you will need a TPS, The EGR can stall a engine if it stays open underload approching a stop where it doesnt close properly

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1 Answer

The car seems to stall when it's idling, that is after the engine gets warmed up.. the rpm goes to under 400 and goes up to 1000. sometimes the engine stops completely when I stop at a stop light.


try to clean the throttle body with some carb cleaner, if that does not work, then you are looking at either the idle control valve, or worse the whole throttle body,

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