97 mack ch613 with e7-350 engine cuts out under load

Do you have to turn the key to get it restarted or does it auto restart itself?

 

Could it be a ground wire?

 

elec.plug on the fuel pump if its not a manual motor

 

Saw that on a different model that finely shut down and would not start. Starter would turn engine but not start. Starter was grounded internally to battery cable and cab was grounded to starter ground terminal. Everything else checked OK but test light would light between engine and frame or starter ground terminal. No ground to engine could be found, even left unhooked, installed one and it started. It had to ground through engine mounts, driveline, suspension, etc. and when it lost ground shut off. Sounds simular, good luck, and let us know what it was if you figure it out.

 

pins go bad get loose lose connection on the plug at the pump alot of the time you can shake that plug and make it act up or clear it up its a sure sign it needs new pins

 

Does this one have the EUP system on the right side of the motor with the PCM right in front of it? If so I had a similar problem and had to do multiple repairs for a fix. First I found that the under hood fuse block was corroded and some of the breakers and fuses had actually broken, but they were unused in my truck so I didn't know until the ECM fuse was affected. It was so bad, I just did a new panel in a more watertight location. Then I pulled my flash codes, got a code 82, found I had a bad unit pump and in pulling several to confirm the electric failure, I found some torn up, leaky unit pump seals. They've been updated a couple times. Have you checked the oil and see if it smells like fuel at all or is your oil over? I also found 2 bad ground wires to the motor and when I removed the PCM clips I found the Metripack terminals on both sides on the front clip were green and corroded so I had to clean them. This is kind of a common issue if you do a search you'll find a lot. One good place to start is to pull your flash codes if you have an electronic failure light. That can point you in the right direction.