Bought a van with an LLY. Crank but no start. It was sitting for 15 years so I started by dropping and cleaning the tank, removing the factory fuel lines, filter, and pump and installed a Fass pump and new fuel lines to the motor. Still no start but I’m just getting started and will find the problem. It supposedly has a bad FPR but the owner couldn’t afford to fix it and left it sit. Videos like this will help me
@@tomaskey6844 your going to need a decent scanner to own and diagnose these trucks. Never trust someone else’s diag. You should always diagnose it yourself
@ yes sir. I have a scanner that will get the job done. I’ll figure it out and now that I have the fuel delivery fixed I’ll keep moving through the system until I find the problem. It supposedly ran a few months ago but by the looks of the diesel in the tank I don’t see how. It was getting thick and sticky.
At the beginning of video you mention having continuity between the 2 data lines. Was the verified when the GP dash light was lit up or whenever the key is on?
@@TRUCK_TECHNICIAN No voltage to the GP. I have verified everything in this video plus more. Voltage where it should be. Grounds are good. Continuity to GP. All new GP installed. New controller installed. No codes.
@@TRUCK_TECHNICIAN Yes, when the outside temp is warm. Or when I have driven the truck. My problem is--When I turn the ignition key to start the truck and the GP light comes on, There is no voltage going to any of the GP.
not much out there for info on LLY's. This diagram and testing glow plugs using the connector helped out a bunch!
Bought a van with an LLY. Crank but no start. It was sitting for 15 years so I started by dropping and cleaning the tank, removing the factory fuel lines, filter, and pump and installed a Fass pump and new fuel lines to the motor. Still no start but I’m just getting started and will find the problem. It supposedly has a bad FPR but the owner couldn’t afford to fix it and left it sit. Videos like this will help me
@@tomaskey6844 your going to need a decent scanner to own and diagnose these trucks. Never trust someone else’s diag. You should always diagnose it yourself
@ yes sir. I have a scanner that will get the job done. I’ll figure it out and now that I have the fuel delivery fixed I’ll keep moving through the system until I find the problem. It supposedly ran a few months ago but by the looks of the diesel in the tank I don’t see how. It was getting thick and sticky.
At the beginning of video you mention having continuity between the 2 data lines. Was the verified when the GP dash light was lit up or whenever the key is on?
What’s the problem you are having?
@@TRUCK_TECHNICIAN No voltage to the GP. I have verified everything in this video plus more. Voltage where it should be. Grounds are good. Continuity to GP. All new GP installed. New controller installed. No codes.
@@davidhaynes3442 is the truck starting?
@@TRUCK_TECHNICIAN Yes, when the outside temp is warm. Or when I have driven the truck. My problem is--When I turn the ignition key to start the truck and the GP light comes on, There is no voltage going to any of the GP.
@ it’s possible the controller is bad if you have a scope you can see if the data lines are talking or trying to talk to the gpm
Great video