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1983 Ford C-8000 : CAT 3208 Rough Idle

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Old 03-15-2015, 11:12 AM
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Arrow 1983 Ford C-8000 : CAT 3208 Rough Idle

Started having an issue with my truck about a week ago. When I am stopped and in drive my RPMs will drop and then the engine will begin to surge. This does not happen if I put the truck in neutral at a stop. The truck has not died on me yet, however, everytime it begins to surge I feel like it's about to quit. Besides this issue it is running fantastic. I put new fuel filters on a couple of months ago and did not change anything with the truck prior to this problem occuring.

Any help with the problem would be greatly appreciated!
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Old 03-19-2015, 07:19 PM
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First thing that comes to mind is the actual idle speed. Then, possible fuel line leaking, or I should say sucking in air. Third, possibly fuel pressure, but not likely the issue.
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