Posted by fixerupper on December 09, 2014 at 17:34:40 from (100.42.82.100):
The subject of poor electrical connections has been brought up here quite a bit so I thought I'd share another story. My son's company has a mid-90's International 9400 semi with a N14 Cummins. It got so It would only start with a whiff of ether. It cranked fine, just wouldn't fire up. After it was running it ran pretty good. He checked fuel lines and filters, even temporarily put a clear hose in the fuel suck line to check for bubbles. He did find a few things that needed attention in the fuel delivery system but fixing them didn't help. He finally took it to a truck repair that favors Internationals and Cummins. They plugged the laptop in and found low voltage to the ECM. The mechanic started digging and found a broken end on a battery cable at the starter so only one cable was doing the job. There are two cables coming from the batteries to the starter as some of you truck guys know. The ECM gets it's power from the starter solenoid and there was just enough voltage drop with that one cable end broken to screw up the ECM so it wouldn't turn the fuel on. A new cable end solved it, but they went ahead and ran new power straight off the battery to the ECM, fused of course, to help keep the voltage up while it's cranking. That cable with the broken eye on the end just nestled down with the rest of the cables and looked perfectly normal, and the engine still cranked like a champ but wouldn't fire. It can be frustrating.
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