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Virtual Wrench
Virtual Wrench, Ford Mechanic
Category: Ford
Satisfied Customers: 14620
Experience:  35 years Master Mechanic
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I have a 1991 Ford F-150 Pickup with 5.0 liter engine. We

Customer Question

I have a 1991 Ford F-150 Pickup with 5.0 liter engine. We found two vaccuum hoses with holes in them and repaired those hoses, and the machine used to diagnose the problem said the idle position sensor was also bad. Replaced that, and it still is running quite rough. The picku had about 170,000 miles on it. It was running fine and then just all of sudden began running rough.
Submitted: 1 year ago.
Category: Ford
Expert:  Virtual Wrench replied 1 year ago.

Hi,

Most likely it has either a bad spark plug or spark plug wire. Thats what it usually is if it just started all of a sudden

Have they been replaced?