I have a 06 lbz and I run it on level 2 ppe hot 2. When im cruising at 60 in 6th gear and go to lug it sometimes it will only bring rail pressure up to 17 thousand and boost will only go up to 8 psi which makes it really doggy.Other times it will build right up to 20 psi with rail at 23 thousand.Theres no codes just acts up when it wants,what could be causing this? Also if I leave it in 4 at 55 and get on it it will not accelerate very fast but if I stay driving in 4th at 55 for awhile and get on it it'll smoke a little and haul ass all the way in tell you let off it.
lbz building boost problem
- Thread starter lb7duramax1993
- Start date
Fresh fuel filter? Have a lift pump?
Possibly CP3 may be getting tired if you answer "yes" to both those questions.
Possibly CP3 may be getting tired if you answer "yes" to both those questions.
New fuel filter and no lift pump but wouldnt it throw a low rail pressure code? If I put it to the floor it builds 25 thousand and holds it all the way intell I let off. Although it will build more boost sometimes and accelerate faster but sometimes when it grabs 5th boost will be around 24 26 but it starts decreasing to about 18 but rail pressure still stays 25 thousand.
Just changed the transmission cooling lines and put a new transmission cooler on my 06 lbz, now it no longer builds boost. Maybe damaged maf sensor when I had to remove air cleaner to access cooling lines?
No boost at all not even at higher RPMs? Vane sensor maybe if it makes boost at higher RPMs... but then you should get a CEL if its not making any boost.