MEP 002a that will run for several minutes and then shut off

[Buckeye Mike]

A friend has an MEP 002a that he picked up. It will start fine and runs for several minutes and maybe as long as a half hour and then will shut down. no rough running just goes from running to not running. Checked the high temp shut off by jumpering it and placing in hot peanut oil and doing checks and it seems fine. He checked the elbows etc in the fuel lines. Still hear fuel returning to tank after the sudden shut down. Had to rebuild the IP to initially get the unit running. Has the IP and injectors at a local diesel injector shop for testing. If it is not the high temp could it be an intermittent oil pressure switch perhaps? I would think if it is running good for several minutes that the IP and injectors are probably going to test good?

 

[Speddmon]

If it is a sudden shutdown as you mentioned, I would be leaning toward the oil pressure switch being intermittent or the high temp switch, since they are the only two safety switches on the set. When you have a fuel issue and subsequent shutdown, typically you have the engine loosing power and sputtering...possible smoking before the shutdown. The only other thing that would cause an immediate shutdown like you describe would be a faulty fuel shut-off solenoid. But since it is an electrically operated solenoid, usually they are either good or bad. You could try checking the linkage from the IP to the solenoid and make sure it's all good.

As long as you have noticed the set has good oil pressure, and can be there to monitor the pressure. Try jumpering the oil pressure switch out of the circuit (move one of the wires on the switch to the other screw to connect the two screws on the switch together) and see if it will stay running. If it does, there was your culprit.

 

[Isaac-1]

You might also try wiring a test lamp across the kill solenoid connector to see if it is dying or receiving a kill signal from the control system. You will have to be watching when it dies though to see what happens first. My guess is also oil pressure switch, you did not say if it will restart after dying, if not someone over on the smokstak board is having a no hot restart problem, one of the suggestions was to check the valve adjustment.

Ike