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2006 Ford E-250 Question: the van shuts off while driving and idles high or low at different times



Visitor, 4.6L V8, Durham, NC, January 07, 2011, 08:11

it idles weird when sitting at a traffic light. it shuts off when trying to stop or make a turn

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, January 07, 2011, 08:33

    The idle speed is electronically controlled y an idle air control motor (IAC). A computer in your vehicle takes in inputs from various engine sensors (it looks at engine temperature, present idle speed, engine load, throttle position, and whether the air conditioning, power steering of electrical loads are on or being operated), the computer processes these inputs and decides what the idle speed should be. It sends a signal to the IAC to determine what the idle speed should now be. The idle speed can only be controlled so much. If the engine has other problems like vacuum leaks, ignition or fuel system problems, or engine mechanical problems these problems may put controlling the idle speed beyond the parameters by which the computer can control the idle speed.
    Check that the engine is running OK, ensure there are no trouble codes or pending codes stored in the power train computer in your vehicle and check that the idle air control motor is functioning.

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