06 no start.

[turbovanman]

Ok, I am still learning but know enough to be dangerous, lol.

Truck was towed in, he said its been getting harder and harder to start over the last few months and finally today, temp around 3 deg c, it died.

No codes, installed fuel pressure gauge inline and has 9-10 psi from the lift pump. I disconnected the FCA and still no start. Pressure according to the scanner is 1260 psi when cranking, FCA hooked up.

I disabled the heaters and tried a bit of ether, it caught a tad but still didn't start.

I cracked a high pressure fuel line at the rail and its weak, it should take my head off, so what tests can I do to verify its the injection pump or ?

Thanks guys.

 

[turbovanman]

No one?

 

[THEFERMANATOR]

Sounds like an injector hung open and it can't build rail pressure. I'm not sure how, but there has to be a way to do a return rate test for the injectors. It sounds like your not building enough rail pressure to allow the injectors to pop as I believe they need about 2300 PSI to open. Either you have a leak somewhere bleeding off high pressure(an injector returning to much fuel), or your CP3 has failed. Make sure you are getting fuel to the CP3, then next check to see how much fuel the injectors are returning during cranking. If it isn't building pressure, has fuel going to the CP3, and the injectors aren't dumping fuel, then your CP3 has failed. Also check to see if it has a high pressure popoff valve in the system as it might have failed. I'm not real familiar with how teh CUMMINS engine is set-up, but it is stil la basic common rail engine.

 

[littleboy]

How many miles are on it ?

 

[turbovanman]

I did some more digging today, redid my basic tests and have 9psi but no volume, spec says 400ml in 10 secs, I got 50. I also talked to a friend who said pumps are common on these due to the lift pumps getting weak and this takes out the main pump. Going to replace the intank pump with a external frame unit and retest the system.