cuts out to idle but doesn't die - Ford Powerstroke Diesel Forum
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Old 11-11-2008, 06:10 AM
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cuts out to idle but doesn't die

runs fine but cuts out to an idle. if i keep my foot in it, it stays at idle. if i let out and then get back into it, it is fine for a while. is this the throttle position sensor?
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Old 11-11-2008, 06:26 AM
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There is no throttle position sensor on these vehicles. The accelerator pedal itself, uses what is called three "potentiometers", meaning three variable resistors. Two are always increasing voltage, while one is decreasing IN THE SAME PROPORTION as the accelerator is moved through its entire travel (from idle to WOT). If any of the voltages go "outside" of the range the PCM "wants to see", it goes into what's called an FMEM strategy to a "forced idle" only mode. To verify this would require use of a scan tool that can monitor your APP (accelerator pedal position) data.
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