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#1
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Trucks done, runs and sounds good, but... at 1500 rpms in all tunes the turbo canes are shutting all the way and making way too much boost, if you hold it at 1500 rpms it comes and goes like its doing a vane sweep, I’m stumped.
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Reger 05' Black Chevy CC/SB LT- Blackout Performance built motor/trans/tuning- Gone The Blessed Hellride- 08' White GMC Sierra SLT CC/SB, 100k miles. Piston eater. Wife's ride- 2016 Pearl white Legacy limited 3.6R Rig ride/new DD-02' Black Eddie Bauer explorer 4.6, -180k, still sporting original trans, outlasted two Duramaxs. |
#2
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Any drive pressure leaks? If not, the next thing to check would be the vane position sensor and actuator.
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Trying some new things... |
#3
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put the stock tune in it and see if it still does it. if so, hard part issue. if not, tune issue. the unison ring may have rusted up some from sitting and is now sticking a bit
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James 02 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/alli "The Limo" BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me. ![]() best time to date: 12.39 motor died/bent rods = 3/11/11 back from the dead 7:04pm 4/9/2012 Limo is back in the garage, now driving a built chevy tracker ![]() Tailgate Crew Member #4 |
#4
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I’m gonna take it out and log it, if the ring is sticking what do I do? Pull the turbo?
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Reger 05' Black Chevy CC/SB LT- Blackout Performance built motor/trans/tuning- Gone The Blessed Hellride- 08' White GMC Sierra SLT CC/SB, 100k miles. Piston eater. Wife's ride- 2016 Pearl white Legacy limited 3.6R Rig ride/new DD-02' Black Eddie Bauer explorer 4.6, -180k, still sporting original trans, outlasted two Duramaxs. |
#5
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basically or keep driving it and see if it will loosen up. actuator could have a bad spot in it as well
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James 02 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/alli "The Limo" BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me. ![]() best time to date: 12.39 motor died/bent rods = 3/11/11 back from the dead 7:04pm 4/9/2012 Limo is back in the garage, now driving a built chevy tracker ![]() Tailgate Crew Member #4 |
#6
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It squeals over 2,000 rpm under a load, don’t have a clue what that means.
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Reger 05' Black Chevy CC/SB LT- Blackout Performance built motor/trans/tuning- Gone The Blessed Hellride- 08' White GMC Sierra SLT CC/SB, 100k miles. Piston eater. Wife's ride- 2016 Pearl white Legacy limited 3.6R Rig ride/new DD-02' Black Eddie Bauer explorer 4.6, -180k, still sporting original trans, outlasted two Duramaxs. |
#7
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If it squeals you probably have a boost leak and need to make a leak tester.
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Current Rides: 1) Toy: 2005 LLY ECSB, Leather, Sunroof -820hp/1748ft-lbs @ Duramax Tuner (6/25/18) - Old 475/87/1.00 setup -Built Motor, Forced Inductions Billet ETR 480/96/1.10 T6, Modded Exergy 250% Injectors, Exergy 14mm Street Pump/LBZ CP3, Goerend J Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD Sump, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support ![]() 2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded -Bosch Reman Injectors, FASS 150, 3" Downpipe, 4" Downpipe Back, Beans Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, Steering Wheel Radio Control Swap ![]() |
#8
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probably an exhaust leak. that would not help the surging issue either. look for soot around all exhaust gaskets. pulling the up pipes and looking at the gasket for any soot coming out between where its suppose to seal will tell you right away too. most of the time the leak is at the up pipe gaskets somewhere.
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James 02 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/alli "The Limo" BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me. ![]() best time to date: 12.39 motor died/bent rods = 3/11/11 back from the dead 7:04pm 4/9/2012 Limo is back in the garage, now driving a built chevy tracker ![]() Tailgate Crew Member #4 |
#9
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I have found a squeal under load is typically a driver pressure leak from an up-pipe gasket.
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06 Silverado 4x4 CC/SB 06 Express 2500 Duramax Van "The Dumpster" ![]() |
#10
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![]() Quote:
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Current Rides: 1) Toy: 2005 LLY ECSB, Leather, Sunroof -820hp/1748ft-lbs @ Duramax Tuner (6/25/18) - Old 475/87/1.00 setup -Built Motor, Forced Inductions Billet ETR 480/96/1.10 T6, Modded Exergy 250% Injectors, Exergy 14mm Street Pump/LBZ CP3, Goerend J Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD Sump, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support ![]() 2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded -Bosch Reman Injectors, FASS 150, 3" Downpipe, 4" Downpipe Back, Beans Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, Steering Wheel Radio Control Swap ![]() |
#11
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hes already had the top end off. if they break off now, its cause they cross thread and never fully tighten so regardless, he will have a leak. hot engine, soak of penetrating oil and a wrench get them out every time for me but i dont deal with the back east rust bull shit.
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James 02 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/alli "The Limo" BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me. ![]() best time to date: 12.39 motor died/bent rods = 3/11/11 back from the dead 7:04pm 4/9/2012 Limo is back in the garage, now driving a built chevy tracker ![]() Tailgate Crew Member #4 |
#12
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![]() Quote:
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Current Rides: 1) Toy: 2005 LLY ECSB, Leather, Sunroof -820hp/1748ft-lbs @ Duramax Tuner (6/25/18) - Old 475/87/1.00 setup -Built Motor, Forced Inductions Billet ETR 480/96/1.10 T6, Modded Exergy 250% Injectors, Exergy 14mm Street Pump/LBZ CP3, Goerend J Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD Sump, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support ![]() 2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded -Bosch Reman Injectors, FASS 150, 3" Downpipe, 4" Downpipe Back, Beans Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, Steering Wheel Radio Control Swap ![]() |
#13
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It’s definitely a boost leak close to the cab, I took it out and it got worse fast, those up pipes are an sob with the cab on, guess I’ll tear back apart. I used new gaskets and even torqued the bolts.
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Reger 05' Black Chevy CC/SB LT- Blackout Performance built motor/trans/tuning- Gone The Blessed Hellride- 08' White GMC Sierra SLT CC/SB, 100k miles. Piston eater. Wife's ride- 2016 Pearl white Legacy limited 3.6R Rig ride/new DD-02' Black Eddie Bauer explorer 4.6, -180k, still sporting original trans, outlasted two Duramaxs. |
#14
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its not uncommon that the "new gaskets" didnt seal... i actually reuse the factory up-pipe gaskets if they are in good shape still
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James 02 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/alli "The Limo" BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me. ![]() best time to date: 12.39 motor died/bent rods = 3/11/11 back from the dead 7:04pm 4/9/2012 Limo is back in the garage, now driving a built chevy tracker ![]() Tailgate Crew Member #4 |
#15
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Passenger side up pipe and manifold was loose, I’ll not torque used rusty bolts again, good to go now. No soot anywhere until I pulled it apart and looked at the gaskets like you said James.
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Reger 05' Black Chevy CC/SB LT- Blackout Performance built motor/trans/tuning- Gone The Blessed Hellride- 08' White GMC Sierra SLT CC/SB, 100k miles. Piston eater. Wife's ride- 2016 Pearl white Legacy limited 3.6R Rig ride/new DD-02' Black Eddie Bauer explorer 4.6, -180k, still sporting original trans, outlasted two Duramaxs. |
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