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Old 06-29-2012, 07:33 AM   eBay Motors  #1 (permalink)
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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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Old 06-29-2012, 06:48 PM   eBay Motors  #2 (permalink)
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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.
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Old 06-29-2012, 08:44 PM   eBay Motors  #3 (permalink)
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Sorry. LBZ egr delete kit with bigger turbo.
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Old 06-30-2012, 05:15 AM   eBay Motors  #4 (permalink)
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You may also want to look at the MAP sensor, I've seen it crack and cause issues too.
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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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Old 06-30-2012, 07:57 AM   eBay Motors  #5 (permalink)
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I looked and it is not cracked. Thanks
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Old 06-30-2012, 08:16 AM   eBay Motors  #6 (permalink)
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What turbo is on it?
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Old 06-30-2012, 08:52 AM   eBay Motors  #7 (permalink)
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Who tuned it? Give them a shout
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Old 06-30-2012, 09:19 AM   eBay Motors  #8 (permalink)
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datalog time
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Old 06-30-2012, 10:02 AM   eBay Motors  #9 (permalink)
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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..
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Tranny and spinny thing to come!
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Old 06-30-2012, 10:14 AM   eBay Motors  #10 (permalink)
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Quote:
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datalog time

X2

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