LML Lml fuel related issues.

[quinton]

Working on a 2012 lml with brand new 12mm pump and 100% injectors. Truck wouldn't build rail pressure for a bit but finally did and ran it for about 30-40min then it died. No knocking or funny sounds while running,little bit of white smoke, could be from stock tune in it. Checked the amount of fuel from return lines and driver side returned 6ml of fuel at 15 sec of cranking while passenger side returned 0. Not a drop. I tried with FPR plugged in and unplugged. I will check passenger side injectors individually tomorrow, but was seeing if anyone had an idea if it's for sure injectors.

 

[quinton]

Anything?

 

[clrussell]

You say stock tune? Like stock cp4 tune?

The one I messed with wouldn't do anything without a tune for the cp3

 

[quinton]

Sorry stock tune for the cp3

 

[quinton]

You say stock tune? Like stock cp4 tune?

The one I messed with wouldn't do anything without a tune for the cp3

Did it give you any codes or would it not just build rail pressure? This on started and ran with no codes and held rail pressure but now it won't get over 120psi while cranking.

 

[clrussell]

Did it give you any codes or would it not just build rail pressure? This on started and ran with no codes and held rail pressure but now it won't get over 120psi while cranking.

I think it wouldn't build enough rail to start

 

[quinton]

Well it runs now but white smokes...

 

[onebaddmaxxx]

Did it lose the cp4 or just do the work because?

 

[quinton]

We went built motor with it, but it had a stock cp3 in it before built motor. It fires up now every time and rail holds at 6k psi at idle. Revs up in neutral to 4K but brake boosting it only goes to 1500rpm then stops.