07 5.9 no start

[DickieGreen]

Hello my 07 5.9 was running rough drained filter under hood drove about another 15 miles and died cranks but no start. I checked filter and changed noticed some water in bottom of filter can so i remove tank flushed tank oun blew fuel lines out installed new lift pump in tank new filter fresh fuel still no start. Thanks in advance for any help

 

[Crunch]

Looks like you covered just about everything but the injector pump. A big expense, but what else is left in the fuel system that could cause the start failure? I doubt that all your injectors would fail at once.

 

[DickieGreen]

I pulled injectors this am some grud on 3 of them tips looked ok just wondering if I should have them tested or bite the bullet and replace them all truck has 146,000 miles any help will help lol

 

[jhenderson]

Put the injectors back in and check cranking rail pressure. The ecm needs to see 3000psi before it will fire the injectors. Low pressure could be a bad prv, cp3, or most likely a bad injector. Water in the fuel is hard on injectors. If the pressure is low, cap the injector lines one at a time, and see if it starts. If it does you have found the problem. Your biggest problem is finding someone with a scan tool that can read rail pressure.

 

[AllianceDiesel]

Injector return will cause hard starts but will start with a sniff of ether. A bad cp3 will not start with ether. I just had a pickup that i was testing for hard starts in the shop. Pulled the truck in did the testing and would not start. Only made 80 psi of rail pressure. For some reason, once i broke the seal between the filter to rail it would never start again. Replaced cp3 and starts right up.

Connector tube nuts need to be torqued from 37-41ft/lbs

 

[DickieGreen]

Thanks for advice I have tried capping off each injector still no start

 

[AllianceDiesel]

You need to read rail pressure to know whats going on