High EGT's, lack of power, black smoke, poor mpg

[2004LB7]

Some of my first tunes for my LMM had aggressive vane position and it was slow to build boost and smoked excessively. Rebuilt the vane table and it works wonderfully now.

 

[Dozerboy]

At WOT? How many RPMs? Even with a bad vane position sensor I was still able to make 20 psi back when I was relatively stock. At WOT 3k rpms.

 

[domeniccurulla]

At WOT? How many RPMs? Even with a bad vane position sensor I was still able to make 20 psi back when I was relatively stock. At WOT 3k rpms.

I'm not sure what WOT is but 7lbs of boost is the highest I see even balls to the wall. I will get an exact rom later when I go to work

 

[JoshH]

7 psi of boost at full throttle?

 

[domeniccurulla]

7 psi of boost at full throttle?

Yes at full throttle. I am going to run into town to workout so will get the RPMS then

 

[domeniccurulla]

7 psi of boost at full throttle?

I hit 8lbs at about 3,600 then my ETG alarm went off

 

[LBZ]

I’d double check your boost numbers with a different sensor or with a standalone gauge.

 

[Dozerboy]

WOT= wide open throttle

I agree with LBZ. Something ain’t right I didnt think you can make that little boost at WOT and 3000+ rpms

 

[dndj]

Possible boost leak?

 

[LBZ]

Possible boost leak?

Would have to be a doozy of a leak.

 

[domeniccurulla]

Had a mechanic check the boost & was the same. He did find that the pipe from the egr delete popped out &there is a small leak on the back of the turbo

 

[ikeG]

It is not giving me any codes right now because somehow my truck lost juice (stereo was wiped too). I remember the code said vane positioning sensor. If we need the actual code I will have to drive it for a while which is ok cuz my metro is down for a couple days

This tells me it's the common stuck vane problem.

Sent from my SM-G960U using Tapatalk

 

[domeniccurulla]

This tells me it's the common stuck vane problem.

Sent from my SM-G960U using Tapatalk

Is the fix for that having it rebuilt?

 

[ikeG]

Is the fix for that having it rebuilt?

Typically you can just remove the vanes and unison ring and clean them up. But at 300k, it could also use a rebuild I'm sure

Sent from my SM-G960U using Tapatalk

 

[Burn Down]

Had a mechanic check the boost & was the same. He did find that the pipe from the egr delete popped out &there is a small leak on the back of the turbo

Same boost numbers with the above pipe fixed?

 

[ZigBlazer]

Did you find the cause? I have an LBZ with a stage 1 turbo (fairly new) that should make boost easier than a stock one. My mileage went down when I put it on, but no black smoke at that time. I remapped the vane table, which helped the mileage, a couple years ago. But recently I am getting some black smoke and high egts. Although I am still getting the required boost (over 20psi). Unfortunately I know I have no exhaust or boost leaks to easily fix.