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deviousgst
DSM Regular
Joined: Fri Nov 07, 2008 10:19 am Posts: 149
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loosing boost, loosing my mind!!HELP
Okay. i searched and searched and done everything possible. this jst started happening about 2weeks ago after i ran my car couple times.. PROBLEM: my boost keeps decreasing as my rpm's go up. I NEVER had this problem. my car always held 20psi all the way pass redline and now it goes to 20 and drops all the way to 10psi.. when i do a 3rd gear pull it goes to 20 and falls to 10psi, when i shift from 3rd to 4th it only goes up to 10 most times i've blt and found leaks on vacume lines and intercooler, bov..i changed em all and still can hold boost..(tried 4 diff BOV's) MODS: big16g(ported eveywhere. ported to make wastegate flapper open more) evo3 exhaust manifold, o2 dump housing, 3inch downpipe and catback and all supporting mods to rund 20psi +....PLEASE HELP ME sorry for long post
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Thu Nov 04, 2010 8:52 pm |
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Wally
Senior Member
Joined: Wed Feb 18, 2009 1:59 pm Posts: 2238 Location: Los Angeles 90006
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Re: loosing boost, loosing my mind!!HELP
Maybe a exhaust before the turbo?? Mine used to do this when I had a crappy exhaust mani gasket. I picked up the 4 layer one from RRE and it went away.
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Thu Nov 04, 2010 10:40 pm |
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deviousgst
DSM Regular
Joined: Fri Nov 07, 2008 10:19 am Posts: 149
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Re: loosing boost, loosing my mind!!HELP
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Fri Nov 05, 2010 1:22 am |
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deviousgst
DSM Regular
Joined: Fri Nov 07, 2008 10:19 am Posts: 149
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Re: loosing boost, loosing my mind!!HELP
well i did another boost leak test, but this time i did it from throttle body and i pressurized it to 20psi. i was looking at my boost gague and it went to 20psi and dropped quick to 10psi and from there it went to 0 about normal speed. like when i do a WOT pull i boost 20 and bleed to 10 quick..anyways, i heard a hiss by my throttle body so i sprayed soapy water and it bubbles on the throttle lever. where the throttle cables wraps around. thats the only place that i can find...any other ideas???
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Fri Nov 05, 2010 4:20 pm |
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awdmonster
frank the tank
Joined: Thu Jun 14, 2007 6:38 pm Posts: 2377 Location: At the stripclub in Ontario!
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Re: loosing boost, loosing my mind!!HELP
_________________ 90 eclipse GSX 609hp 450tq E85 1/4mile 11.7 @ 121 mph personal best on a 20g 1/4mile 11.6 @125 mph personal best on a FP GREEN on a wounded HG 1/4mile 10.5 @ 136 mph personal best 3582R Las Vegas 1/4mile 10.41@ 137.9 mph Fontana personal best 3582R 5 Gears...4 wheel drive/steer...3 Diamonds...2 cams...1 Turbo...0 Reliability
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Sat Nov 06, 2010 9:54 am |
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fmedgsx
DSM Regular
Joined: Sun Dec 20, 2009 6:48 pm Posts: 267 Location: san diego the whales vagina
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Re: loosing boost, loosing my mind!!HELP
take your boost controller out of the picture. run a line from the wastegate directly to the boost source and see if it still bleeds down. also you may want to check the turbo for shaft play and all around servicability. meaning status of the wheels and housings. There will be no need to rebuild the throttle body at the moment as a tb seal leaking wont effect it to the extent that you are seeing. it will be needed later after you figure out what is causing the symptoms. do all the basic stuff first because thats normally what causes the problems.
_________________ Kris Albee 1997 pearl grey gsx project Holly Wood 1991 tsi awd stock bottom end w/ 2g head, kiggly springs, HKS 272's, RC1200's, shep4, QM twin, fp manifold, full megan exhaust, hx35 in bep housing, ets 4" fmic, BJ'sSMIM, Tial bov, tial 41mm, v3 ecmlink SD, 30psi, E85, 99 problems and this Bitch is one
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Sat Nov 06, 2010 10:50 am |
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deviousgst
DSM Regular
Joined: Fri Nov 07, 2008 10:19 am Posts: 149
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Re: loosing boost, loosing my mind!!HELP
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Sun Nov 07, 2010 6:26 pm |
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awdmonster
frank the tank
Joined: Thu Jun 14, 2007 6:38 pm Posts: 2377 Location: At the stripclub in Ontario!
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Re: loosing boost, loosing my mind!!HELP
_________________ 90 eclipse GSX 609hp 450tq E85 1/4mile 11.7 @ 121 mph personal best on a 20g 1/4mile 11.6 @125 mph personal best on a FP GREEN on a wounded HG 1/4mile 10.5 @ 136 mph personal best 3582R Las Vegas 1/4mile 10.41@ 137.9 mph Fontana personal best 3582R 5 Gears...4 wheel drive/steer...3 Diamonds...2 cams...1 Turbo...0 Reliability
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Mon Nov 08, 2010 12:46 am |
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deviousgst
DSM Regular
Joined: Fri Nov 07, 2008 10:19 am Posts: 149
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Re: loosing boost, loosing my mind!!HELP
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Mon Nov 08, 2010 10:45 am |
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-red97rum-
Senior Member
Joined: Mon Aug 10, 2009 9:57 am Posts: 1077 Location: Ontario, CA [IE]
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Re: loosing boost, loosing my mind!!HELP
Could you have ported it too much leading into the internal flapper? It's possible the flapper is getting blown open and the stock actuator isn't strong enough to pull it shut again. I doubt this is the case at your current boost levels though..
_________________-Dustin 1992 Tsi Auto Swapped 10.67@126mph
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Mon Nov 08, 2010 11:14 am |
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deviousgst
DSM Regular
Joined: Fri Nov 07, 2008 10:19 am Posts: 149
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Re: loosing boost, loosing my mind!!HELP
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Mon Nov 08, 2010 11:55 am |
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awdmonster
frank the tank
Joined: Thu Jun 14, 2007 6:38 pm Posts: 2377 Location: At the stripclub in Ontario!
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Re: loosing boost, loosing my mind!!HELP
_________________ 90 eclipse GSX 609hp 450tq E85 1/4mile 11.7 @ 121 mph personal best on a 20g 1/4mile 11.6 @125 mph personal best on a FP GREEN on a wounded HG 1/4mile 10.5 @ 136 mph personal best 3582R Las Vegas 1/4mile 10.41@ 137.9 mph Fontana personal best 3582R 5 Gears...4 wheel drive/steer...3 Diamonds...2 cams...1 Turbo...0 Reliability
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Mon Nov 08, 2010 12:00 pm |
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Wally
Senior Member
Joined: Wed Feb 18, 2009 1:59 pm Posts: 2238 Location: Los Angeles 90006
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Re: loosing boost, loosing my mind!!HELP
What was the last thing you did before this started happening??
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Mon Nov 08, 2010 12:20 pm |
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-red97rum-
Senior Member
Joined: Mon Aug 10, 2009 9:57 am Posts: 1077 Location: Ontario, CA [IE]
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Re: loosing boost, loosing my mind!!HELP
_________________-Dustin 1992 Tsi Auto Swapped 10.67@126mph
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Mon Nov 08, 2010 12:32 pm |
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boosting_laser
Senior Member
Joined: Tue May 22, 2007 10:48 pm Posts: 781 Location: Whittier
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Re: loosing boost, loosing my mind!!HELP
_________________Hugo Best 1/4 mile: 10.78 @ 131, 27psi, E85 Best 1/8 mile: 6.97 @ 101, 29 psi, E85531.5whp 414.8tq @ 29psi, FP3575 on Q16
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Mon Nov 08, 2010 12:59 pm |
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