6 5 Diesel Lift Pump Not Working

So to answer your question yes a non working lift pump will cause the engine not to start.

6 5 diesel lift pump not working. As there could be other reasons for the lift pump to not work and there could be other reasons for your diesel not starting. If the pump is running but not delivering fuel check the following items. How to replace a lift pump in a 6 5 liter turbo diesel. 93 6 5 full mechanical gm turbo diesel and nv4500 5 speed trans full throttle test drive.

If voltage is not present you will need to trace the circuit. This truck has a bad fuel injection pump. But it is important to know you are diagnosing that the lift pump is not working and all commands to the pump are intact. Before replacing a diesel fuel lift pump that is not working be sure to check for 12 volts at it s terminals with the truck running.

If 12 volts is not present the problem may lie with the oil pressure switch located at the back of the left cylinder head. Here is what it can sound like. Replaced the pump and it runs great. The lift pump on a gm 6 5 liter turbo diesel engine provides diesel oil to the fuel pump which in turn supplies fuel to the injectors.

This vehicle is a 1995 chevy suburban 2500 6 5 liter turbo diesel. Suburban 6 5 td stock lift pump. Check for voltage to the lift pump with a test light again while cranking. Use paperclips to back probe the connection instead of unplugging the pump since an unloaded circuit will give a false reading.

Strange that it has anything to do with the ac electrical circuit or engine load. If not the most likely cause is a bad lift pump which is located inside the frame rail underneath the driver s seat area. The most common problem with these. The typical symptoms of a failing lift pump will be harder starting and lower power during operation.

If voltage is present replace the pump. When a lift pump malfunctions the engine s fuel pressure will drop.