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DDEC IV self acceleration
brought into the shop DDEC IV w/4500SP once truck warms up it self accelerates sort of like the high idle switch is turned on and off. This is a military HEMTT, has zero codes in engine and XSMN. Cannot find an issue in the high idle circuit not the Jake brake(retard) circuit. and help would be much obliged.
Last edited by mrwrenchhead; 12-13-2018 at 11:50 AM. Reason: grammar
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