2009 4.0L Idle Speed? - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 03-29-2010
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2009 4.0L Idle Speed?

So week 1 as a new 2009 Ford Ranger XLT Supercab with the 4.0L and I have a question?

What should my warm engine idle speed be? I have just over 10,000.

Mine seems to bounce between 1000 and 1250 rpms. I can be approaching a stop at say 25 MPH and pop the transmission into neutral and the revs will spike to 1500 and stay there until I come to a complete stop. It then rolls back to 1100-1250.

I can me rolling along at 35 MPH in OD, on a flat at about 12-1300 RPM, take my foot off the gas and pick up speed until I hit 1500 rpm.
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Old 03-29-2010
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i know mine sorry not 4.0 idles high when cold even while driving until the engine is warmed up in the mornings i leave and have 3 stop signs in a row and it will almost drive itself between them with out me ever hitting the gas lol
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Old 03-29-2010
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good? my 04 5speed does that too. tps mayb
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Old 03-30-2010
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push clutch in, come to stop and pop into neutral mine idles at about 750 to 850
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Old 03-30-2010
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mine usually does too but sum time hangs a higher rpm 2, so did my lil cousins 04 he took it to ford a few years ago and i think he said they changed the tps, i cant remember been to long ago lol
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Old 04-02-2010
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I had the local Ford dealer take a look at it under warranty. I wasn't crazy. They replaced the IAC (Idle Air Control Valve). It now idles at 750-800 and it doesn't feel like it wants to jump away a stop.

Thanks for the input.
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