Do I need a new throttle body?

Asked by Mrwest10 Dec 24, 2016 at 12:15 PM about the 1993 Ford F-150 XLT 4WD LB

Question type: Maintenance & Repair

I have a 1993 f150 xlt 5.8 and my problem is when
in park the engine idles very high.i have put a new
idle control sensor on it and that worked for a few
min.then I put a new throttle body position sensor
on it and that worked for about 2 weeks.i
unplugged the idle control sensor for about 8 hrs
and when I cranked it up it ran fine until I went to
the store around the corner and it idled high
again.does anyone have any other suggestions  I
need help!!! Thanks in advance

1 Answer
74,220

OJ answered 7 years ago

You can try to thoroughly clean it first with throttle body cleaner, not carb cleaner. The PCM controls the amount of air and gas entering the engine. It's controlled via sensors, you could have a bad one. If there are no idiot lights check for internal codes not causing the light to come on. Check for vacuum leaks also, those could cause a problem. PCM engine analyzer may be needed.

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