I have a 06 LBZ,
Not mine but it ran good and had bad head gaskets, so another shop did the work and screwed up doing the head gaskets, mech didn't adjust valves #6 intake got messed up.
I went it found the problem and fixed it,
Now, when you run it down the road it feels almost like its in limp mode, low power but still gets moving and goes through the rpm range and shifts, (not perfect but works)
then usually around 45mph of limping along WOT it will all out cut loose and pull hard to 95mph. Once or twice I got it to pull from 0mph but its never consistant, once it took until 80mph and sometimes around 30mph but its usually in that 45 50mph range that it goes. If your running 65mph+ and cruising and then stand on it, it will usually take off no problem. If you slow down to 30 and go WOT it takes a while. While WOT once in a while I can feel it kinda surge like it wants to cut loose but its very slight.
While its running weak, boost is around 12lbs, when it lets loose it hit 22-24lbs
fuel psi idle is 4500ish then you hit the throttle it goes up around 16-19kpsi but kinda bounces around, again when it cuts loose it jumps just like the boost up to around 25,500psi give or take.
No smoke or very little if any.
It had an exhaust break I thought may have caused it, so I removed it completely, even back to stock exhaust (no cat).
It had a fass pump on it, I thought maybe it was not working right, bypassed it, same thing.
Looks like it had a egr delete, but the plate was laying in the back of the truck when I got it.
I have no idea what the other mech did or did not do, I know he is a joke though. I was getting Maf codes, switch maf, havent had another.
Although I havent drove the truck more than a 10 miles there are no current codes.
I would like to say the turbo is dumping boost like a stuck waste gate but then there would be lost of smoke and wouldn't fuel demand spike also. Both fuel and boost are working together
any help would be great.
I can't find anything from searching.
Not mine but it ran good and had bad head gaskets, so another shop did the work and screwed up doing the head gaskets, mech didn't adjust valves #6 intake got messed up.
I went it found the problem and fixed it,
Now, when you run it down the road it feels almost like its in limp mode, low power but still gets moving and goes through the rpm range and shifts, (not perfect but works)
then usually around 45mph of limping along WOT it will all out cut loose and pull hard to 95mph. Once or twice I got it to pull from 0mph but its never consistant, once it took until 80mph and sometimes around 30mph but its usually in that 45 50mph range that it goes. If your running 65mph+ and cruising and then stand on it, it will usually take off no problem. If you slow down to 30 and go WOT it takes a while. While WOT once in a while I can feel it kinda surge like it wants to cut loose but its very slight.
While its running weak, boost is around 12lbs, when it lets loose it hit 22-24lbs
fuel psi idle is 4500ish then you hit the throttle it goes up around 16-19kpsi but kinda bounces around, again when it cuts loose it jumps just like the boost up to around 25,500psi give or take.
No smoke or very little if any.
It had an exhaust break I thought may have caused it, so I removed it completely, even back to stock exhaust (no cat).
It had a fass pump on it, I thought maybe it was not working right, bypassed it, same thing.
Looks like it had a egr delete, but the plate was laying in the back of the truck when I got it.
I have no idea what the other mech did or did not do, I know he is a joke though. I was getting Maf codes, switch maf, havent had another.
Although I havent drove the truck more than a 10 miles there are no current codes.
I would like to say the turbo is dumping boost like a stuck waste gate but then there would be lost of smoke and wouldn't fuel demand spike also. Both fuel and boost are working together
any help would be great.
I can't find anything from searching.
