LBZ: Stock lbz smokeing during normal driving

[jmw1439]

MY lbz has been smokeing more then it should lately i have set it back to stock have new air fitler checked for boost leaks and have no codes. sometimes its ok and then others its worse

 

[MAXX IT OUT]

What color smoke? Have you checked your injector balance rates?

 

[jmw1439]

It's black and yeah the worst two were both like 2.9 that was checking them in park after a half hour drive

 

[x MadMAX DIESEL]

Good fuel pressure?

 

[jmw1439]

Yeah it checked out good it was where it should be

 

[x MadMAX DIESEL]

Whatever your tunes calling for. Low rail pressure cause an injection that's harder to fully burn

 

[jmw1439]

I am reading my actual and desired rail pressure off my predator tuner but it's on stock now while I'm trying to figure this out

 

[jmw1439]

Sometimes I can step on the gas and it will go just fine and be clean and then other times it will dog Down and throw a big cloud of black. And thanks to y'all who have been tryin to help me out

 

[countrycorey]

What air filter? Mass air flow sensor dirty? Fresh fuel filter?


Corey

 

[jmw1439]

I have a new stock paper filter on it .and I cleaned the maf sensor and it really wasn't dirty to start with. But I think I'm gunna give the turbo boost/map sensor a clean as well and try that too

 

[x MadMAX DIESEL]

It hasn't been throwing any codes?

 

[02greysixer]

Weak egr blowing open under boost?

 

[jmw1439]

No none I even check every now and then. One thing I'll say is my tuner shows me makin 12.5 psi of boost at idle which I know is way high could that make it over fuel sense it thinks it has so much air? Or does it not work that way wondering if my boost sensor is reading wrong

 

[jmw1439]

I ordered a blocker plate the other day to see if it's that and iv been wantin to install one any how. Wish it would throw a code to put me in the right drection

 

[x MadMAX DIESEL]

That info is coming from your map??

 

[jmw1439]

From what I understand that's where it reads boost from. I don't have a gauge for it

 

[countrycorey]

No none I even check every now and then. One thing I'll say is my tuner shows me makin 12.5 psi of boost at idle which I know is way high could that make it over fuel sense it thinks it has so much air? Or does it not work that way wondering if my boost sensor is reading wrong

It's reading absolute pressure


Corey

 

[jmw1439]

Ok so it's not reading true boost so no point to really go off of that then I guess

 

[jmw1439]

Well I installed the blocker plate and wow it's like a new truck no smoke and has more pep and I can hear the turbo more again. So the egr valve must have been blowing open or sticking open.

 

[02greysixer]

Sweet