LML Runs but no start P0087

[Duramaxduner]

I have a 2011 LML with a 4" MBRP straight pipe and H&S tuner. Runs awesome but it wont start without giving it a shot of starting fluid. Had the CP4 and fuel pressure regulator replaced and that did not change a thing. It throws the P0087 code and every time I reset the fuel filter life in about 10 mins it goes back to 0%. Any idea what it could be?

 

[Porno Joe]

how old is the fuel filter?

When you go to start the truck, is the primer button on the filter head hard or can you pump it?

 

[NC-smokinlmm]

Could be a restriction in fuel supply line...

 

[Duramaxduner]

No, the primer bulb is not hard, I can pump it.

 

[Ridin'GMC]

It sounds like a restriction issue.

 

[Duramaxduner]

Where would I start looking?

 

[NC-smokinlmm]

Check where the fuel line goes from hard to soft near the trans...

 

[BLACKMAX1]

Check where the fuel line goes from hard to soft near the trans...

There and also where the. Come up into the engine bay near the glow plug module, mine were collapsed there

 

[testdrive]

signature indicates that he has a Airdog lift pump... something wrong with the between tank and filter.
Not a good idea to use either for starting.

 

[Ridin'GMC]

signature indicates that he has a Airdog lift pump... something wrong with the between tank and filter.
Not a good idea to use either for starting.

That is on a LMM, he is talking about a LML. Try replacing the filter and see if you can get it primed.

 

[02greysixer]

What kind of fuel filter? If it's a plastic one try replacing it with an o.e. style metal one

 

[Duramaxduner]

Ya I need to update my sig. It does have an OE style filter but I can change it out. I guess I will start checking the lines.

 

[Duramaxduner]

Ok now I can not get it to start at all. The thicker line right by the transmission is squishy and the thinner one is hard. I don't if that means anything to you guys, but it just sits there and turns over.

 

[Dirtbag]

Is it primed? Might need to bleed the air out more..

 

[BLACKMAX1]

The system will bleed air as it's turned over. Your cp4 pump could be shot.

Sorry, just re read original post.

 

[BlackHillsHD]

It needs a set of injectors. If the CP4 went out, the injectors are toast.

 

[02greysixer]

X2. If you want to rule out the supply side either hook up a supply pump or rig up a temp tank.

 

[Duramaxduner]

Alright thanks, I am at a loss so I think I am going to bring it somewhere Thursday. I was just hoping I could at least get it running again to bring it where it needs to go. It just seems so odd to me that once it is running, it runs and performs totally perfect like nothing is wrong. Just getting the thing started is the issue.

 

[Duramaxduner]

Bad Injectors

So we bottle tested all the injectors last night and they are returning way too much fuel and they think that is the reason why its not building enough pressure to start. I'm guessing something happened to the first pump and that is why there must have been metal through them or something. I ordered all new injectors and they will be going in this weekend. Any tips on replacing LML injectors?

 

[BlackHillsHD]

There really is no tips and tricks on them. Just a lot of BS in the way. You're going to need a Tech 2 to program flow rates. LML's will set a light instantly if they don't match.