Question about 1997 Ford Ranger SuperCab

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97 Ford Ranger 4.0L V6 Idles rough only when cold

Only when you first start it... and only on cold days. Replaced MAF sensor. checked for vacuum leaks, none found. Replaced 2 O2 sensors. bank one and 2 lean. Im running out of Ideas.

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  • Ryan O'Rand Dec 31, 2008

    1. Check Codes-clean EGR exhaust tubes and replaced sensor

    2. Replaced Throttlebody vacuum hoses

    3. Checked Intake for vacuum leaks

    4. Checked Fuel Pressure

    5. Replaced MAF Sensor for lean codes and rough running

  • Ryan O'Rand Dec 31, 2008

    oh and yes I did replace the PCV valve

  • davidkay61
    davidkay61 May 11, 2010

    I replaced everything once, nothing worked, until I realized I didn't
    replace everything, the cheapest thing is what I forgot, the PCV valve.

    Did you try that already?

    I'd try it...$2.45. Also, the troubleshooting guides in the front of
    the Haynes manuals have helped me solve what I otherwise thought were
    simple things.



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It's the intake gaskets more than likely. I am about to do that job tomorrow on my Exploder. It has the exact symptoms as yours. It is a Ford customer care recall for the gaskets. I believe it's a 6 yr. 75,000 mile recall. The gaskets are only $15 dollars, worth a shot if you have all day. I have owned a lot of Fords and they are ****!

Posted on Feb 05, 2009

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Ther is a air Idle control valve located on the side of the throttle body. unplug it remove it spray it and clean it with carb cleaner replace it plug it back in and you will be a Happy person again.


Posted on Feb 01, 2009


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