LB7 Starting issue

[BombDocDiesel]

A buddy is having problems with his LB7. He just had the injectors replaced. The truck ran fine and he drove it home. It sat over the weekend and when he started it, it only ran for a couple of seconds and died. It would crank but not start after that. A few pumps on the primer and it fired right up. This happens every morning after sitting overnight.

Ideas?

 

[BlkMax]

Are there any fuel leaks from the injector lines? Is it making oil?

It sounds to me like he is getting air in the system somewhere.

 

[BombDocDiesel]

No leaks found or reported.

I agree on the air.

 

[BlkMax]

What about the oil? It could be leaking under the valve covers into the pan.

 

[BombDocDiesel]

I will have to ask.

 

[8100 Power]

WIF cracked?

 

[BombDocDiesel]

WIF cracked?

He said the filter and WIF are good.

Filter or WIF sensor letting air was the first thought.

 

[RKTMech]

Pump the crap out of the fuel pump and look for fuel leaks at the filter housing area and at the fuel inlet and return line area on driver side of engine.
Your leak is most likely outside engine. Check bleed screw o-ring and then never touch it again. Check filter housing rubber hose connections and fuel connections at the FICM (right behind the alternator) these are most of the places that they could have touched when doing the injectors.

 

[SmokeShow]

aren't the fuel filter housings known for allowing air in the system sometimes and hafta be replaced for this reason?


c-ya

 

[BombDocDiesel]

Thanks to everyone for helping.