Thought it was a bad crankshaft sensor

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Thought it was a bad crankshaft sensor

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07-13-2018, 11:57 AM

ILUVMILS

Senior Member

Join Date: Sep 2002

Posts: 3,082

Several MB models powered by the M273 V8 of that vintage had issues with the engine control units failing under the conditions you're describing. I've diagnosed them by using a heat gun to get the control unit hot even when the engine is cold. The problem is with the signal to activate the fuel pump...........

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