I have Cummins 2250 engine<yesterday noticed some wetness on ECM harness. I washed it with brake cleaner and today it is wet again. Fuel is coming from upper plug. By cummins quickserve ECM is between gear pump and fuel filter. Filter was changed 5000 miles ago so it should be not dirty. Never have 2250 ECM open but 871 as i remember has a cooling plate not fuel inside ECM. Any suggestion please.
Fuel leaking from ECM
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Snailexpress, Oct 5, 2017.
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Did you find the problem, same thing is happening to my 2250, I've been running like that for a while now but is getting worse.
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Thanks for the reply, yeah i thought the same thing when the leak started. But if you see on the picture below this connector that goes on the head is showing some wetness too. My guess is that is coming from inside the engine and running through the wiring harness like the others said. But is not from the fuel rail pressure sensor in my case.
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Snailexpress Thanks this. -
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Found the problem after the starter die on me. Starter was only 1 year in a half old. I guess the fuel leaking on top of it damaged the starter. I replaced the starter and put truck in the shop. Aftertreament control valve was leaking from one of the sensors and running through the wiring harness. Valve is behind the ECM , i put a new wiring harness the old one was in a bad shape.
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spsauerland and Goodysnap Thank this. -
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