Looking for some motorpool assistance, As the subject line states the issue. This has a DDEC IV w/ 4500SP, occurs when the engine reaches Op temp or runs for about 45 min at idle. No Codes on truck we have tested high idle, Jake brake, and PTO circuits. The Jake brake is not currently working but not real confident that that is causing our initial issue. Although we will start TS the Jake brake in order to find out why it is not activating just to give a break from the self acceleration issue. This fault is not listed in the TM so it is an experienced based problem.
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