2019 Won't start

[jakehester]

I have a 2019 model, and it will idle, run and drive great when it starts. If it sits for over an hour it keeps getting airlocked. Checked all of the fuel lines and components for cracks or leaks and have found nothing. The only way it will start after sitting with the motor off is with starting fluid. Any tips or advice would be greatly appreciated.

 

[USMC]

I would make sure that your rail pressure is staying where it should.

Diagnostic excerpt.

Diesel fuel from the fuel tank to transported to the fuel filter by the in-tank fuel pump. The fuel pump is driven by the fuel pump relay present in the MPDC. The fuel pump relay is controlled by the EMS ECU. The fuel pump turn On when ignition switch is turned ON. Fuel enters the fuel filter. The fuel filter has an in-built water in fuel and fuel temperature sensor. The signal from both sensors are sent to the EMS ECU. If EMS ECU detects water present in fuel, the water in fuel indication in the instrument cluster turns ON. Fuel then enters the metering unit. The metering unit is mounted on the inlet of the fuel unit pump. The metering unit controls the volume of fuel entering the unit pump. The unit pump pressurizes the fuel into the common rail. The common rail has a rail pressure sensor to monitor rail pressure build up. The fuel is then injected into each cylinder by individual fuel injectors. EMS ECU actuates the solenoids in the fuel injector in sync with engine timing for correct injection

 

[txroadkill]

Did the issue start after a filter change?


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[Land Rover]

Could it be that you have an air bubble in your fuel system? Have you tried bleeding the fuel system to see if this helps? In my experience, diesel fuel systems do not like air bubbles, and they will refuse to start if one is introduced to the system. (Have you loosened anything or changed your fuel filter without bleeding the system? If so - Bingo, there's the problem.

 

[jakehester]

The issue started out of the blue. I figured the person that was driving it ran it out of fuel since the instrument panel does not and has not worked in several years, but it still had half a tank of fuel in it. So far, I have bled the system multiple times, dropped, drained and cleaned the fuel tank. Replaced the fuel filter, took off, cleaned and blew out all of the fuel lines. Tested/checked both the FCU and pump, replaced the fuel cap, breather hose and filler neck hose.

Again, if it starts and runs, it runs absolutely great. After sitting with the engine off for an hour or longer it will not start again.

 

[USMC]

I would put a pressure gauge on the fuel rail and run the vehicle. Leave the pressure gauge on the fuel rail after you turn the vehicle off. See what the gauge shows after the vehicle sits for awhile.

 

[Land Rover]

From all you have said and done, it seems odd that there is still a problem remaining. Could the injection pump be bleeding air back into the system? I feel confident that you have checked all of the lines for tightness. Have you cracked the injector connections (after the one hour shut-down),and after cranking the engine, do the injector lines require a bit more time to pressurize (i.e. - dribble fuel)? This idea is dubious, but it may help point a finger back at the injector pump and where the fuel enters the injector pump. (If our circumstances were reversed, this situation would have given me ample opportunities to polish up on my profanities because these ideas are the best I can think of.)