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I have an 03 Ford Taurus with less than 100,000.It runs

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great on the freeway and...
I have an 03 Ford Taurus with less than 100,000.It runs great on the freeway and around town without the ac. The car stalls when at a stop sign or light after it gets up to running temp with a load on the motor, eg. ac or hard turn on auto steering pump. It doesn't happen when the car first starts and runs for 4-5 min. The sensor light came on at first, it was running rich. The sensor was replaced and the light stays off. Auto tech ran all diagnostics, replaced sensors, idle motor, ran internal checks on valves, compression, rebooted computer, got stumped and sent it to Ford. They ran all the diagnostics got stumped and called in a Ford specialist. He smoked the intake man and said there was a minute leak. They sent it back to the first tech.The part is scares but one was found from a rollover and replaced. Tech called me today and said the car has kicked his butt. He has calls out to a couple of older techs but doesn't promise anything. Any suggestions?
Submitted: 1 year ago.Category: Ford
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8/21/2016
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago
john -aka eauto
john -aka eauto, The Car Guy
Category: Ford
Satisfied Customers: 16,537
Experience: ase tech over 15 years in the field
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have they cleaned or replaced the mass air flow sensor? Has the iac been changed?

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Customer reply replied 1 year ago
The tech replaced the afs with three different manufactures including Ford
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

Has the iac been changed?

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Customer reply replied 1 year ago
IAC?
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

(iac) idle air control on the throttle body

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Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

no codes at all ?

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Customer reply replied 1 year ago
The tech has reached out online to Ford techs and preformed all their recommendations over the last two weeks. The codes use to come on rich but after replacing the maf sensor they stopped
Customer reply replied 1 year ago
When the car stalls now no codes
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

does it run good? is the check engine light on or flashing?

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Customer reply replied 1 year ago
It runs great, no lights on dash.
Customer reply replied 1 year ago
It only stalls when you come to a stop with the ac on. It's like you turn off the key.
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

does it shake n shutter ? doess it feel like a loss of fuel ? or a loss of ignition?

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Customer reply replied 1 year ago
It doesn't happen when the ac is off.
Customer reply replied 1 year ago
For another $26, I'll pass. I just thought I'd try online, it sounds like you are coming up with the same recommendations already tried.
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

its one of 2 things its a bad IAC or a bad ac compressor

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Customer reply replied 1 year ago
Wouldn't the AC compressor throw a sensor?
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

no it would not...the ac system is not connected to any warning lights...

Your description tells me there is a excessive load when the compressor kicks on. This means its ruled down to a idle air control valve not adjusting correct or a internal air compressor issue

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Customer reply replied 1 year ago
It happens when the power steering pump is strained too
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

with the ac on or off?

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Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

will it stall with the ac off ? if you put a ps strain on the system?

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Customer reply replied 1 year ago
With the AC off
Customer reply replied 1 year ago
The ps will stall the engine by it self
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

then its the iac...i would replace the IAc with a ford one..and inspect the throttle body closely for damage...a reman throttle bottle may be the best option

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Customer reply replied 1 year ago
OK Will pass the recommendation along. Thanks
Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

Please remember to only rate my service when you are satisfied. IF you feel the need to rate "Poor Service" or "Bad Service", please stop and reply to me via the REPLY TO EXPERT button with the issue you have. I will be happy to continue further and do everything I can to provide you with the service you seek.
I am not paid unless I get a rating of 3 to 5 Stars/Smiley Faces. As always I'm happy to provide my time/service & resources so If I have helped you with your question, please give me an appropriate rating so that I get credit for helping you. Thank you and good luck with your vehicle!

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Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

now dont forget if the defrost is on even if its on heat the ac operates to defog the windshield..so verify the defrost and ac is off

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Ford Mechanic: john -aka eauto, The Car Guy replied 1 year ago

can you rate me 3 to 5 stars so i can close this question out and if you need any further help please let me know

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john -aka eauto
john -aka eauto
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