Question about 1995 Ford F150 Styleside Regular Cab

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I have a ford f-150, 5.0 liter that is lousy on fuel mileage. The exhaust is black indicating mixture too rich to me. What do you reccomend

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  • tim mcgrath May 11, 2010

    read computer codes to start out, possible bad map,o2, fuel regulator, miss fire

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Check MAP sensor make sure that the vacum line going to it is good and not leaking, if you have a scan tool you could check voltage should be about 1.10 volts at idle and go up to 5.0 volt's at full throttle, also check your CTS (coolant temp. sensor) but you will need a scan tool, both of these sensor act like a chock also have your catalitic converter check if it clog it will run rich also, being if not enough air can go out, then not enough air can come in, to much gas not enough air.Hope this was very helpful.

Posted on Feb 05, 2010

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1 Answer

Why does engine run rich at times under acceleration?


not enough detail
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