631G
Senior Member
We have a 01 Freightliner with a Detroit 12.7L series 60 engine in it that has suddenly lost all its power. The day before the issue started the truck ran great. It pulled one of our heavier pieces that we move ourselves, a Komatsu PC360, and was fine. Our driver comes in the next day and heads out only to find that the truck has lost all its power to the point that it struggles to get up to 45MPH unloaded. There is no smoke from the exhaust pipes, cranks easily, filters have all been replaced, drained the tanks when we replaced the filters (all good there) and there are no check engine lights lit up. I am at a loss here.
We are going to try putting a new fuel pump on it today and see what happens there because that's how it seems to be acting (loss of fuel). Could this be an electrical issue? We do have a battery disconnect that we use at night to keep the batteries hot when it sits for a while. Any thoughts on where to start are appreciated.
Truck Info:
2001 FLD120
Serial #: 1FUJAHCG41PF95559
We are going to try putting a new fuel pump on it today and see what happens there because that's how it seems to be acting (loss of fuel). Could this be an electrical issue? We do have a battery disconnect that we use at night to keep the batteries hot when it sits for a while. Any thoughts on where to start are appreciated.
Truck Info:
2001 FLD120
Serial #: 1FUJAHCG41PF95559