Horrible Idle, Then Engine stalls

Hyundai Elantra Questions - Engine stalls / hesitations at ...

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CarGurusApr 20, 2013 - Engine stalls / hesitations at idle and low acceleration - Model: 1999 Hyundai ... stopped... and then at one last desperate pump of the gas pedal, the ...Despite all this, most of the time, the car runs smoothly, and several shops have .....Keep in mind that my car is Elantra 2001 with 82k miles on it, the car will ...

My car keeps shutting off when idle.. - CarGurus

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CarGurusFeb 15, 2013 - whenever im on breaks or, it stutters for then cranks right back up. ... of your question, the stalling, hopefully somebody will come by to help you on that. ....Car having trouble starting,rough idling,shutting off at stop 2 answers.

How to Fix a Car That Stalls: 7 Steps (with Pictures) - wikiHow

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wikiHowThere are many things that could cause a car to stall. ... Your engine stops runningbecause it is not igniting gas in the cylinders, this occurs either because there ...

Check the idle position sensor.

This maybe due to a dirty Idle Air control valve or a throttle position sensor. YouTube can provide good answers for removal and testing of the Throttle Positon Sensor (TPS) as well as cleaning the Idle Air Control Valve (IAC)

If it stalls when the brake lights come on then the idle is too slow. The high amps of the lights will load down the engine and lowers the idle.

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.
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.

If it's surging, make sure your radiator is full. Do a tune up, plugs, wires, etc. Put some fuel injector cleaner in your fuel tank. On a cold start the vehicle compensates for being cold by adding fuel. Once it warms up the computer tells it to quit adding extra fuel. If it is a bad sensor of sorts, check engine light should come on.

Ignition timing would not change with the engine temp.
I'm going to assume the check engine light is not on when the engine is running, otherwise you would have checked the computer for trouble codes. And I'm sorry you dumped so much money in parts trying to fix it before troubleshooting it first.
The two things that come to mind based on your description are low fuel pressure or a problem with the EGR valve. Did the friend check base fuel pressure with the engine cold and warmed up ?

I would check the idle air control valve before replacing anything.
The computer regulates the idle speed by controlling the amount of air entering the intake thru the throttle body.
The valve could be faulty, or the throttle body can be gummed up.
Is the check engine light on ?

on the power steering rack is a sensor to increase the rpm on idle so AC and power steering doesnt stall engine ,its located on the top of the steering rack ,sorry feeling tired so iam to bed in this time zone

Ignition system sounds probable on vhicle when everything gets warmed up. High pitched hum could be bad tire or worse bearing.

thanks