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Eric
Eric, Automotive Repair Shop Manager
Category: Ford
Satisfied Customers: 29981
Experience:  Automotive Repair Shop Manager, Technician
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2003 f550 6.0 - intermittent erratic idle.... won't let

Customer Question

2003 f550 6.0 - intermittent erratic idle.... won't let me choose category as ford...
Submitted: 1 year ago.
Category: Ford
Expert:  Eric replied 1 year ago.
HI,
I am sorry that you have not been helped yet. I just came online and saw your question
Ok, first you need to check for any vacuum leak, air intake tube leak, or leak around intake manifold
With engine idling, spray around intake manifold, throttle body, each vacuum hose and air intake tube with carb cleaner. If idle smooths out when one is sprayed, the replace it.
If ok, check for dirty throttle body and clean if needed.
If ok, then fuel pressure will need to be checked, fuel filter checked, water in fuel checked, and finally engine compression
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