HJ60 fueling issue

[FatlessLemon]

Hey all!

Ive been having some issues with my HJ60 that just started happening today. Truck was running great until it wasn't.

I was stopped at a light and when I went to accelerate it felt like the truck was hesitating but then it drove normal again. This continued to happen and get worse and worse until one point I had the pedal to floor just to get through a stoplight.

It had the same feeling like the truck was starving of fuel. When I got home I pulled the sedimenter and fuel filter and all seemed clean and good. All injectors were tight and all crush washers were replaced last year.

I'm wondering if its a lift pump failure? I put some clear line between the hard line from the tank to the inlet on the lift pump and there are no bubbles that come through when I work the hand pump so I feel like that rules out an air leak from the tank. When I open the bleed nipple and pump the hand primer the diesel doesn't come out as a steady stream, it's very foamy and lots of air comes out as I prime it. The hand primer was also replaced last year as well. Does anyone have any ideas?

Thanks!

 

[ceylonfj40nut]

Crack you fuel filter bleed nipple and see if a steady stream comes out when hand priming. Those hand priming pumps are known to leak.

 

[FatlessLemon]

Crack you fuel filter bleed nipple and see if a steady stream comes out when hand priming. Those hand priming pumps are known to leak.

When i crack it and pump it foamy and airy diesel comes out, I can't get a steady stream. It's been replaced with the bosch hand pump.

 

[duncanrm]

A small guide I wrote on a 2H sucking air:

2H - Sucking Air/Fuel Restriction

docs.google.com

 

[FatlessLemon]

A small guide I wrote on a 2H sucking air:

2H - Sucking Air/Fuel Restriction

docs.google.com

Ya thanks I found that guide on another thread, helped me fix the issue. All of your guides you have up on Google docs have been really helpful sorting out issues I appreciate it!

I pressurized the lines from the lift pump forward and saw bubbles. Turns out it was sucking air in at injector one below the return pipe. Replaced the washer there and all was good.

 

[duncanrm]

Turns out it was sucking air in at injector one below the return pipe. Replaced the washer there and all was good.

Interesting.. had the return line been disturbed any time recently?

 

[FatlessLemon]

Interesting.. had the return line been disturbed any time recently?

Yea, I just finished pulling off the old head and put a new one on. The threads on the injector were pretty trashed but I was hoping it was good enough. It lasted about two days with the truck running before the nut worked itself off and came loose but not loose enough to notice until I pressurized the system.