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Stalling after idleing to long not shifting when it should be the code that comes up is po171

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Check for loose Air Ductwork, or if MAF sensor is dirty (clean with mild soapy water and dry), or use a water spray bottle when the engine is running and spray around intake manifold and hoses. What you have is a Lean condition on bank1. This is interferring with the fuel being drawn into the engine on one side. You could also have a bad connection to the MAF.

If someone changed an Air filter recently and did not get the parts together right, it will show this code.

Posted on Oct 08, 2010

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1998 Ford Contour 2.5 litre, 30,000 km. Started cold after sitting for a day in -20C temperature, and idles for little while then quits, and smells like gas. Idle speed fluctuated and surged up and down...


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the lean codes is probably a vacuum leak or maybe a MAF sensor is bad or dirty

missfire is dependant on engine if a V10 it may be a coil actually pretty likely on the modulars not uncommon thats for sure
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What are these codes in toyota rav 4 PO171 PO105 PO760 PO 770 PO130 PO171


OBD=11
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mustang forum solution.


http://www.moddedmustangs.com/forums/v6-mustangs/39429-trouble-code-po171.html



I had the same problem. Scroll down in that link.
you are running too lean.
Chip? tune?

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1998 FORD CONTOUR CHECK ENGINE CODES P1131 AND PO171. REPLACED 1 OF THE OXYGEN SENSORS, CHANGED PLUGS, PLUG WIRES, OIL AND FILTER, ALSO REPLACED AIR FILTER AND CLEANED PCV FILTER, RESET PC AND IT RAN GOOD...


sounds like EGR valve and sensor this controls idle speed when at a stop. the po171 is a burn lean or rich code need to know what bank 1 or 2. also check for a vacuum leak from one of the hoses.

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My 2002 Ford Taurus will shutter and die when running the air conditioner and sitting idle at a stop sign or stop light. When I turn on the air conditioner the rpms will fluctuate up high above 2 and then...


the idle air control valve is responsible for engine idle.
this is a common failure on ford's. but I don't think yours is bad because it does idle high befor it dies.
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good luck and keep me updated

wesleyschacht@hotmail.com

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1 Answer

Truck starts but will not idle


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