2005 Freightliner with a mercedes engine wont start

Once truck is running check the fuel water separator for air bubbles. If you have bubbles then you have a leak. Start by checking the fittings on the fuel lines and visually check for leaks on lines. Take the separator apart and check the rubber o rings. Mine was a compressed o ring on the bottom side of the separator.

 

It may be bad injector nozzle and to find out you have to pull out all of them. Before you do that prime it by hand pump it is pitch it will take a lot effort and time. But once it starts running it will smoke continuously and it will run very rough then diffenetly it is the injector nozzles one of them or may be more. Good luck. I had an pre egr. 2003 model and I parked about 10 years ago just getting rusted in my parking lot.

 

I'm having the same problem but sometimes it starts and other times I have to use starting fluid I replaced the fuel chech valve and its been to freightliner several times and this time it came back with ether in the cab

 

I did those tests and it ended up being the fuel filter housing was allowing air in the fuel system so it's up and running for now again thank you

 

replaced starer motor engine turns over will not fire had freightliner test ECM said no problem should i replace ECM engine harness? is there a test to see if that is the problem?

 

2005 m2 freightliner with mercedies engine wont start new starter motor bateries charged crankes but no fire had ecm checked at freightliner and they said i might need ecm wire harness is this a problem with this model how do i change harness?

 

In my situation i ended up replacing the fuel filter housing which was sucking air and i previouly replaced the check valve thats on the computer on the side of the block it i cant believe its there but sure enough

 

I had the same issue and i replaced the fuel filter housing and its been working since