Asked by Jul 27, 2014 at 12:29 AM about the 1991 Ford F-250 2 Dr XL 4WD Standard Cab LB

Question type: Maintenance & Repair

Having trouble turning down the idle. The truck idles at 1300 rpm and emissions needs it
down to 850 to 900 rpm. I have backed off the idle adjustment as far as it can go. Know
change ????

3 Answers


Check for vacuum leaks. Also check pcv valve. If it's stuck open this can happen.

1 out of 1 people think this is helpful.

Check for vacume leak,s in hoses,s,bad one,s will make it idle high.

1 out of 1 people think this is helpful.

Diito dandy

3 out of 3 people think this is helpful.

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