truck isn't ideling right please help - 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 05-18-2006
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truck isn't ideling right please help

when i first start my truck, the engin is at 2,000-2,250 RPM's. i rev it some and it still stays the same. then after ideling for about 5 min, the RPM's go down to about 750. RPM's stays at 750 for about a minute and then goes back up to 2,000-2,250 RPM's. does anyone know what is wrong?
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Old 05-18-2006
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if youre still under warranty, i would take it back in
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Old 05-23-2006
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sounds like the idle sensor to me. thats what was wrong with mine... among other things.
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Old 05-23-2006
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try re setting the computer
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Old 05-23-2006
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mine does that when the A/c clicks on its horrible...
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Old 05-23-2006
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its the IAC, let the dealer fix it, im sure its still nder warranty
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Old 05-23-2006
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Quote:
Originally Posted by zabeard
its the IAC, let the dealer fix it, im sure its still nder warranty
yep its still under warranty. i'll call the dealer when i get home from school
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Old 05-23-2006
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i had that same probably but i was told it was the IAC but when i took it to a shop they said it was a vacuum hose had a hole in it
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Old 05-24-2006
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it could be a few things, and IAC, or a vacuum leak .... could be a dirty maf, mine had a high idle, replaced the IAC, checked for vacuum leaks, and cleaned my maf, still had a high idle, then a week later the TPS took a ****, truck wouldnt start due to it sending a signal of WOT so there was no injector pulse, anyways I replaced that and the High Idle went away ... i never thought a tps would cause that ... ... but i would take it to the dealer .... good luck!
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Old 05-28-2006
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yea mine does the same thing, but it goes up and down, and going in reverse it gets really low, Anybody have a clue what it is? 4.0 running in mine.
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Old 05-28-2006
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Quote:
Originally Posted by firefighterjohn2001
yea mine does the same thing, but it goes up and down, and going in reverse it gets really low, Anybody have a clue what it is? 4.0 running in mine.
Look at the posts above you...


Also, whats the rpm ranger happening for you. If its goin up and down with a clicking sound and its not a big difference it is most likely just A/C compressor kicking on and off. Going into reverse would make it go low(altho i dont know how low really low is).

Aaron
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Old 05-28-2006
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just like im at a stoplight, it idles down and up, with the a/c off, i heard somthing about the air flo sensor, but i cant figure it out
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Old 05-28-2006
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How much rpm is it changing?

I don't remember if this is right, but I believe the air compressor still works when you're driving, that it needs to maintain pressure.

Aaron
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