JNM Equipment

We finally found the root of the problem! The contaminated diesel damaged all 6 of the injector fuel pumps. Changed them out and the truck starts.

I can confirm we checked the fuel lines, all six injector are receiving fuel it’s just not dumping fuel in the cylinders for some reason. It’s a manual granite. I’m in the Cayman Islands in a hard spot at the moment with the truck.

Well ended up getting another engine control unit and got it reprogrammed to the main ecu. Put both in and the same problem continues to happen. Following that I got the truck diagnosed, we could see that all 6 cylinders are inactive and not receiving fuel. The code FMI 13 PID 91 came up which relates to the throttle sensor. Changed that and the problem is still occurring.

Yeah I can confirm the engine hours and mileage is displayed on the tach.

Ran back thru lines and all you mentioned seems fine. We noticed that no power from the ECM is going to the injectors nor is there any smoke coming from the exhaust when the truck is rolling. Will run some more electrical test tomorrow and any other suggestions welcomed. Thanks

Thanks but still no luck as we’re not getting any signal when we plug in the diagnostic computer to see what’s wrong. Worth mentioning that primer pump is not holding fuel (not getting firm when we pump it) and injector 1 and 6 looks like it’s not getting any fuel.

Yes and there’s no significant loss of coolant. Thanks

Hi Guys, I’m troubleshooting my 04 Mack Granite CV713 after I had a bad case of water in diesel. It was spluttering and initially thought it was the filters that were bad. But when I pulled the filters we realized there was a significant amount of water in the diesel. We drained the tank of the contaminated diesel and got clean diesel. We have bled the injectors and changed filters but the truck just keeps rolling. Following that there is evidence of fuel getting to the system, the truck starts with quick start solution briefly but is unable to start on its own - just keeps rolling. Grateful for any any suggestions or insight on this matter. Thanks, Jordan McLean