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DirtWorx

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  1. DirtWorx
    1999 Mack RD688S E7 misfire under load, cuts out sporadically - injectors, EUP, ECM, or wiring harness? Engine runs correct under normal operating conditions unloaded. Engine cuts out sporadically for a split second then comes right back on when loaded or unloaded. Engine sputters under uphill load until throttle is decreased. Engine injector(s) disengages and reengages sporadically under uphill load. Diagnostics shows injector 2 and 3 low voltage.

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