07 lbz boggs down at full trottle

[Zjosh951]

hey there everyone im not sure if im in the right side of the fourm im new here and would love for u guys to help me out i own a
2007 lbz silverado i been haveing problems with it latly
everytime i full trottle it boggs down and shoots black smoke and if i let go of the trottle and trottle again 50% trottle it well drive normal
i changed the fuel filter 800 miles ago and it started doing this crazyness when i changed it i primed it the right way
the things ive done to see if it well help but didnt
clean the maf
clean the airide intake
checked if i have any codes (none) no Ses
but what i notes is that ontop of the fuel filter it leaks alittle fuel from the heater plug when i prime it could it be that ?

please help me out i dont wanna get stuck in the middle of the road

 

[LBZ]

:welcome9:
Need more info.

What mods have you got done, how many miles, have you access to a diagnostic tool I.E. EFI Live to check balance rates?
And you say this started right after you changed the filter?

 

[Zjosh951]

Need more info.
What mods have you got done, how many miles, have you access to a diagnostic tool I.E. EFI Live to check balance rates?
And you say this started right after you changed the filter?

i dont have access to one at the moment and corrcet right after i changed the fuel filter
miles: 172.000
mods are only
airide intake
and muffler delete

 

[LBZ]

That's odd that you wouldn't have any codes.
It would be nice if you could check injector balance rates.
Do you have a boost gauge? Maybe you have a boost leak or a turbo that is on it's way out.

 

[NC-smokinlmm]

If your filter head is leaking fuel then thats where id start. The rebuikd kits are cheap and its easy to do...

 

[ScreaminDuramax]

Do you oil your filter or is it a dry filter? I made the mistake of oiling my dry filter and it did this. Ive also had it happen to me when my MAF was bad. I cleaned it and cleaned it and it never really fixed it 100% , I bought a new one and it was all good from there.

 

[Zjosh951]

That's odd that you wouldn't have any codes.
It would be nice if you could check injector balance rates.
Do you have a boost gauge? Maybe you have a boost leak or a turbo that is on it's way out.

at the momment i dont have one i was thinking of buying one

 

[Zjosh951]

If your filter head is leaking fuel then thats where id start. The rebuikd kits are cheap and its easy to do...

i ordered a rebuilt kit ill have to rebuild it and see if thats ny problem or not

 

[Zjosh951]

Do you oil your filter or is it a dry filter? I made the mistake of oiling my dry filter and it did this. Ive also had it happen to me when my MAF was bad. I cleaned it and cleaned it and it never really fixed it 100% , I bought a new one and it was all good from there.

airaid filters are dry i cleaned it a while back not long ago
i also cleaned the maf to check if it was that and still not it
its just hard for me with out a scan tool

 

[catman3126]

egr blocker plate?

 

[Zjosh951]

egr blocker plate?

how do i know if i have one i bought the this truck a year/half ago

 

[Megadeth]

how do i know if i have one i bought the this truck a year/half ago

 

[LBZ]

I doubt he has one unless it was tuned in which case it could be a few different things. He would be getting a CEL constantly for insufficient flow if he had a blocker and no tuning.

I'd start with the boost leak myself and seeing what codes are logged along with an injector balance check.

 

[Zjosh951]

i see now i was under the engine bay last night going around no it doesnt have a egr blocker as stated in the picture and checked the intercooler pipeing for any leaks on the hoses and none but what i did notes is i primed the fuel filter just 3 pumps and it started to leak out from the heater plug

 

[NC-smokinlmm]

It's most likely your filter head drawing air. Rebuild it...

 

[LWATSON]

You said your problems started right after a fuel filter change. Remove the new fuel filter and inspect the seals on it. Make sure the oring from the old filter didn't haing up and stay on the hub. Reinstall the filter and attempt to make a good seal. If you still have issues I'd try a new filter simply to rule this out.

 

[Zjosh951]

You said your problems started right after a fuel filter change. Remove the new fuel filter and inspect the seals on it. Make sure the oring from the old filter didn't haing up and stay on the hub. Reinstall the filter and attempt to make a good seal. If you still have issues I'd try a new filter simply to rule this out.

ill tray and do what u told me im also gonna rebuild the top part and see if it sloves my problem

 

[02greysixer]

If it's a plastic filter replace it with an o.e. style metal one. Plastic ones leak.

 

[Zjosh951]

found the problem and FIXED
after checking pipeping for leaks no leaks egr was fine and clean fuel filter was clean also
maf was clean and air filter

the problem was the upper fuel filter primer was leaking out when pumping the primer it was leaking out the heater plug. Rebuileded it with a rebuild kit and it salved my problem
thanks for everyone help

 

[NC-smokinlmm]

Good to hear. Feels good to fix it yourself...