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Randomly shuts off

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I have 1994 Mack em7 300 V Mack 1 randomly shuts off at idle  and when driving I had injection pump rebuilt is it possible to have a bad alternator or regulator that is supplying erratic voltage to injection pump

Edited by Mike1
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I always suggest checking the Duetch plug at the injection pump.  Those pins can come loose in side.. also check for bad wires on the truck side of the harness..

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