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Old 08-27-2017, 07:26 PM
Undrstm8ed Undrstm8ed is offline
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Join Date: Apr 2013
Posts: 1,682
Default Re: Trucks sputtering after going on the highway

Quote:
Originally Posted by kevinbmx77 View Post
Ive replaced the distributor cap and rotor, the coil, and i checked the spark plugs. In the fuse box theres a diode that was loose and would cause the engine to cut out a but when tapped so i replaced it and that stopped but i still have a stuttering issue

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yes, that diode is used to keep the ALT from back feeding itself. Mine wanders a bit if I am on really bad spur roads.
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