heykw

I am working on a 2000 5.9 for a friend of mine the truck is very hard to start and once it is running the truck white smokes. when u give it fuel it will only rev up to 2500 or so and white smokes (raw fuel) the only code is one for batt temp to hi. Help thanks

06RAM2500

Sounds like bad injectors, VP44 is going, or weak compression.

logskidder

Hows it run after you blow the carbon outta her?

heykw

it keeps breaking up.

Redliner

May have an air leak....

logskidder

Look into the injectors and then the pump.

heykw

air leak? do I need to pull the injectors?

kantdrive55

You should be able to crack the injector lines one at a time at the injector and listen to see if there is a change in the way the engine runs. If the injector is good the engine should start to run rougher when the line is cracked. Then you do it back up and it goes back to running better. If you find one that doesnt change at all when you crack it, that is a pretty good sign the injector has a problem in that hole.

It might also be the grid heater? When it warms up does it run any better?

heykw

thanks. it does not run any better when it is hot

kantdrive55

Rule out the grid heater then.

heykw

I just got a used pcm I am going to try that and see what happens.

pokapotato

Usually white smoke is because of poor compression or retarded timing. How does the blowby look? Has there been excessive oil consumption? How does the engine sound? Does the engine come up to operating temperature as far as coolant temp? Do you have good transfer pump pressure?