Boost Issue

zashoe · 10-08-2012, 12:14 PM

2002 WRX. just replaced turbo <1k miles ago. I THINK I'm having compressor surge. I boost fine at ~18psi until 4k rpm. then boost drops to 9psi and rebuilds to 15-17psi by redline. I'm not sure whether it's compressor surge, waste gate issue, boost leak somewhere, etc. I thought it was the stock bov. tries turboxs hybrid to no avail. the car has roughly 134k miles. I data logged if it will help anyone to view the results.

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wrxlaunch · 10-08-2012, 01:16 PM

Kinda turbo did u replace with and what was on there before? Have u checked for leaks?

zashoe · 10-08-2012, 05:47 PM

just stuck with a td04. I can't find and obvious leaks. not to say it's impossible..

tebriel · 10-08-2012, 05:53 PM

that's gotta be a wastegate issue.

zashoe · 10-08-2012, 08:54 PM

I'm not sure how to tell if it's waste gate. I datalogged so I'll take a look when I get home from class and see if I can make sense of it.

kgrander · 10-09-2012, 08:28 PM

wastegate.

zashoe · 10-09-2012, 11:49 PM

it turned out to be launch control! it was interfering with the BCS!

10-08-2012, 12:14 PM	#1
zashoe Scooby Newbie Member#: 329523 Join Date: Aug 2012 Chapter/Region: MAIC Location: Hagerstown, MD Vehicle: 2002 Impreza WRX World Rally Blue	Boost Issue 2002 WRX. just replaced turbo <1k miles ago. I THINK I'm having compressor surge. I boost fine at ~18psi until 4k rpm. then boost drops to 9psi and rebuilds to 15-17psi by redline. I'm not sure whether it's compressor surge, waste gate issue, boost leak somewhere, etc. I thought it was the stock bov. tries turboxs hybrid to no avail. the car has roughly 134k miles. I data logged if it will help anyone to view the results. * Registered users of the site do not see these ads.

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10-08-2012, 01:16 PM	#2
wrxlaunch Scooby Specialist Member#: 181298 Join Date: May 2008 Chapter/Region: MAIC Location: MD Vehicle: 02 , Vf43 Inside.. 12 seconds at a time	Kinda turbo did u replace with and what was on there before? Have u checked for leaks?

10-08-2012, 05:47 PM	#3
zashoe Scooby Newbie Member#: 329523 Join Date: Aug 2012 Chapter/Region: MAIC Location: Hagerstown, MD Vehicle: 2002 Impreza WRX World Rally Blue	just stuck with a td04. I can't find and obvious leaks. not to say it's impossible..

10-08-2012, 05:53 PM	#4
tebriel Scooby Newbie Member#: 244190 Join Date: Apr 2010 Location: Madison, WI Vehicle: 2004 BRP WRX Wagon 2004 JBP WRX	that's gotta be a wastegate issue.

10-08-2012, 08:54 PM	#5
zashoe Scooby Newbie Member#: 329523 Join Date: Aug 2012 Chapter/Region: MAIC Location: Hagerstown, MD Vehicle: 2002 Impreza WRX World Rally Blue	I'm not sure how to tell if it's waste gate. I datalogged so I'll take a look when I get home from class and see if I can make sense of it.

10-09-2012, 08:28 PM	#6
kgrander Scooby Newbie Member#: 323584 Join Date: Jun 2012 Vehicle: 2004 wrx rally blue	wastegate.

10-09-2012, 11:49 PM	#7
zashoe Scooby Newbie Member#: 329523 Join Date: Aug 2012 Chapter/Region: MAIC Location: Hagerstown, MD Vehicle: 2002 Impreza WRX World Rally Blue	it turned out to be launch control! it was interfering with the BCS!