i have a 2001 5.9 cummins and it has a problem when the motor is cold i takes a few seconds to start. the fuel pressure guage reads about 15psi when its idleing and when you have it gased it fluctuates between 15 and 30 it has a quadzilla xzillerator and a BD diesel lift pump relocator. i have replaced the batt and the alternator and starter. if you have any idea whats wrong can you please help me.

 

Are you allowing the the intake air to heat up befor you start?

 

Any time you start your pickup you need to let the "WAIT TO START" light go off then crank it. If you are doing this and still having trouble your grid heater could be shot. If that's not the problem make sure you check all your fuel lines for wet spots indicating a leak. Try plugging it in at night or put it on a timer for a few hours before you plan on starting it.

 

i always let the light turn off before i start it i havent tried to plug it in yet cause it never gets below 50 degrees where i live so its not that cold. it has a small amount of diesel under the third injector but it was doing it before i found the leak im in the process of fixing the leak.

 

Whats you exhaust smoke look like after it starts? Do you have any smoke when it starts?

 

Yeah it is like a grey color when I start it

 

Ok, your geting fuel. you might be burning some oil. How many miles? and have you disconected the Quadzila to see if it runs normal? Some thing easy to do When you first start it, get a Lazer temp gun and have some body start your truck. Point the temp gun at the exhaust manifold and see if you have a(ny) cylinder(s) that are cold. The one(s) that are slow to warm up you might want to do a compresson check.

 

check the return banjo fitting at back of cylinder head,just a slight wetness around fitting will cause bleed down in fuel rifle and cause hard start after sitting over night.
been there done that!!!