Help Losing Boost Presure - Chevy and GMC Duramax Diesel Forum
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post #1 of 13 (permalink) Old 06-29-2012, 07:33 AM Thread Starter
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Help Losing Boost Presure

I have EFI just installed a week ago. When I build 20psi boost it drops back to 10psi and just about puts me in the wind shield. On top of that, when I put it on level 1 it runs like I am pulling 30k pounds, alot of RPMs and no go. Any idea what it could be? I do have a build trany and few other mods.
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post #2 of 13 (permalink) Old 06-29-2012, 06:48 PM
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Quote:
Originally Posted by parkplug92mx View Post
I have EFI just installed a week ago. When I build 20psi boost it drops back to 10psi and just about puts me in the wind shield. On top of that, when I put it on level 1 it runs like I am pulling 30k pounds, alot of RPMs and no go. Any idea what it could be? I do have a build trany and few other mods.

I'd start by filling out your signature so we know what truck you have.

Then you'd benefit from pressurizing the intake to 30 psi using shop air and listen for leaks.

2005 Silverado EC/SB, LLY, 4WD, EFI DSP5 V2 (Idaho Rob at ATP), Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w/ Suncoast Filterlock and Transynd ATF, Bilstein 5100's (Norcal), Cognito UCA's, 17" NBS alloy rims, 265/70R17 Michelin LTX M/S2's, Pioneer AVH-P3200BT, CubbyCam Backup Camera, Pop & Lock Power Tailgate Lock, Extang Solid Fold Tonneau Cover, Tekonsha P3 Brake controller, Alphatherm AT-38OD Washer Fluid Heater
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post #3 of 13 (permalink) Old 06-29-2012, 08:44 PM Thread Starter
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Sorry. LBZ egr delete kit with bigger turbo.
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post #4 of 13 (permalink) Old 06-30-2012, 05:15 AM
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You may also want to look at the MAP sensor, I've seen it crack and cause issues too.

2005 Silverado EC/SB, LLY, 4WD, EFI DSP5 V2 (Idaho Rob at ATP), Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w/ Suncoast Filterlock and Transynd ATF, Bilstein 5100's (Norcal), Cognito UCA's, 17" NBS alloy rims, 265/70R17 Michelin LTX M/S2's, Pioneer AVH-P3200BT, CubbyCam Backup Camera, Pop & Lock Power Tailgate Lock, Extang Solid Fold Tonneau Cover, Tekonsha P3 Brake controller, Alphatherm AT-38OD Washer Fluid Heater
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post #5 of 13 (permalink) Old 06-30-2012, 07:57 AM Thread Starter
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I looked and it is not cracked. Thanks
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post #6 of 13 (permalink) Old 06-30-2012, 08:16 AM
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What turbo is on it?

06 LBZ EC/LB 4x4
Built Motor/Trans Bullseye s475/87/.9 45% Injectors Stock CP3 Built and Tuned by Blackout Performance 11.76 @ 115
FOR SALE
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post #7 of 13 (permalink) Old 06-30-2012, 08:52 AM
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Who tuned it? Give them a shout

Gideon
01 LB7 EC/SB Ally 4x4
DD: 1990 4runner completely stock 4x4 3.slow

2007 Yukon Denali - Hers

Big Thanks To Adrenaline Truck Performance, Alligator Diesel PerformanceSocal Diesel and Lincoln Diesel Specialties
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post #8 of 13 (permalink) Old 06-30-2012, 09:19 AM
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datalog time

CCSB LB7 4x4
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post #9 of 13 (permalink) Old 06-30-2012, 10:02 AM
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mines doing the samething, i found my stock egr leaking, time to delete it! try the soap and water test when the trucks cold.. a bit quicker and easier then pressurizing the whole intake, you'll find it if its a big leak..

2006 silverado 2500hd loaded,blue LED conversion, cobalts, CTS,6'' skyjacker, softride springs
mbrp down pipe, 4'' straight pipe, 7''mbrp stack,
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Ignited 8000k low beams, highbeams, fogs.Banks ram air,bushwaker fender flairs,35'' Nitto Mud Grapplers
RBP 18'' 94r's, RBP RX-2 running boards, RBP RX HD Grille,BD turbo gaurd,Airdog2 165,Longhorn Fab Shop trac bars,alpine 7'' double din, 2 Type S's under the rear seat,trainhorn

Tranny and spinny thing to come!
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post #10 of 13 (permalink) Old 06-30-2012, 10:14 AM
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Quote:
Originally Posted by rebpdt View Post
datalog time

X2

A good EFI log file would help alot (use Duramax LBZ Imperial PID when logging if you do)

2005 Silverado EC/SB, LLY, 4WD, EFI DSP5 V2 (Idaho Rob at ATP), Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w/ Suncoast Filterlock and Transynd ATF, Bilstein 5100's (Norcal), Cognito UCA's, 17" NBS alloy rims, 265/70R17 Michelin LTX M/S2's, Pioneer AVH-P3200BT, CubbyCam Backup Camera, Pop & Lock Power Tailgate Lock, Extang Solid Fold Tonneau Cover, Tekonsha P3 Brake controller, Alphatherm AT-38OD Washer Fluid Heater
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