Looses prime

[Tkp]

Truck is on its third lift pump. Have to pull start, to get started. What am I overlooking?

[Mopar1973Man]

Air leaks. Typically occur on the suction side where there is no pressure but vacuum that draws air in. What happens is you park the truck it continues to draw air into till the system has lost prime.

 

Get it running as soon as you shut down pressurized the fuel tank using blow gun and a rag. Now have a second person hunt for moist joint with the system pressurized.

 

Only need 1 to 2 PSI. Don't get crazy with pressure.

Edited July 29, 2019 by Mopar1973Man

[Tkp]

Thanks for the input

[dripley]

Leaky return line from the VP and back of the head, bad springs on the cross over tubes. Basically anything on the fuel system that can let air in will cause hard starting. Some of those leaks want be visible.

[Evan]

Can you hear lift pump come on when you turn the ignition on but dont start the truck?

[dave110]

3 hours ago, dripley said:

 bad springs on the cross over tubes. 

This caught my eye. I assume you meant o-rings. Or what am I missing?

[dripley]

2 hours ago, dave110 said:

This caught my eye. I assume you meant o-rings. Or what am I missing?

Good catch my friend. O ring would be correct. Though I am working on an auto eject tube.

[dave110]

I didn't mean to pick Dave. I saw that and was thinking  OMG. There's springs in there? Either I lost mine or their jammed in there somewhere. I'm always learning so I leave anything to possibility.

[Evan]

I thought the same thing but didnt want to say anything I to was like **** I haven't seen and springs