2001, Chevrolet, Duramax Diesel 6.6
1/4 tank of fuel, stopped for fuel, topped it off, won't restart.
Completely serviced the day before. 400 miles on the service.
Turns over fast, but won't start, act's like it's out of fuel.
After several attemps to start, check the fuel filter, Empty. Why?
Fuel tank is full, filter is clean.Battery is strong.
filled the filter, primed the system, truck starts.
WHAT WAS THE PROBLEM ??? Afraid to drive it now.
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We do not have wiring diagrams here. The material is copy protected and not free to share online. You can buy access and download the factroy diagrams here, you can also buy the factory repair manuls used here.
Very odd. A Google search comes back with lots of "Duramax" hits . The code is: "Fuel System Leak Detected - Large Leak" Some fixes that I found were replacing the fuel filter, others changed the FPRV (Fuel pump return valve?) When you're pulling a trailer there is a much greater load (air resistance) even when just cruising. Empty or fully loaded, it's mass won't matter, it's the extra fuel required at every phase of your drive. If the fuel filter is getting clogged, it's possible that some sensor is showing a pressure that is beyond predetermined limits. Try the fuel filter replacement first to see if that fixes it.
'02 Duramax engine has the injectors under the valve covers. There is a set of "fuel return" lines that are attached to the injectors under the valve covers too. This is where I would be looking for fuel.
Well, one problem is, if its an 8.1, its not a diesel. The 8.1, or Vortec 8100, is a gas engine. The DuraMax is a 6.6 engine. There is usually not a priming system on a gas engine, because the fuel pumps will usually get it through the smaller filters used quick enough you dont need them. However, if it is a DuraMax engine, then right on top of the fitting where you mount your diesel filter, there is a primer pump and an air bleed valve. What you do is, open up that air bleed valve ( its a little black plastic octagon shaped thing on the top of the filter mount) then you pump the primer (the silver button looking thing) until you get diesel squiting out the air vent without too many air bubbles or gurgles.