The Diesel Garage banner
1 - 4 of 4 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter · #1 ·
2000 Gmc c6500 3126 cat Allison transmission. I'm having problems with it shutting off while driveing. It will restart but once you starting driving again it shuts back off. Re starts. It's got me puzzled. I replaced the heui pump, fule filters, ipr, injector harness, pulled all the injectors looking for bad o rings. Replaced the fuel pressure valve. On the back of the head. Still shuts down while driveing. Runs all day long as long as its parked. I'm not able to get a scan tool to hook up to the computer. I dont know if its because the person I bought this truck from changed the steering column. If any one can help I would really appreciate it. Thanks..
 

·
Junior Member
Joined
·
204 Posts
Are you getting any codes or check engine light? Could be just losing ignition power to the ecm through a bad connection. With the truck sitting still nothing would be bouncing around causing a loose or shorted connection. Check your battery connections.
 

·
Registered
Joined
·
2 Posts
Dose it die when you put it in gear, when you push the gas pedal, driving smoth roads, or after hitting a bump? I'm going to assume it's after hitting a bump. Start with the ground connections (battery connections, block to frame, body to frame). If those are good, then with the motor running start shaking any wiring harness you can reach. If it stalls then open that harness and see what's going on. Sorry I can't say that you have a specific problem.
 
1 - 4 of 4 Posts
Top