Boost control problems 2003 wrx

Powsurfer96 · 02-24-2020, 12:42 AM

I took a data log today because my car had been feeling weird. The log shows my boost climbing up to 18psi (target) then it would drop down to about 10psi and climb back up To 18 again. It does this over and over through my pull. I could hear it leaking out like a blow off valve when it would drop. It’s a bugeye on a Cobb stage 2 map with a catted downpipe and Cobb intake. Where should I start troubleshooting?
No obvious leaks that I could see. Can post up the log if anyone wants to see it.

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Therumblebox · 02-25-2020, 02:34 PM

Are you running the stock boost controller?

Powsurfer96 · 02-25-2020, 10:11 PM

Quote:

Originally Posted by Therumblebox

Are you running the stock boost controller?

Yes it’s stock

02hybridwrx · 02-26-2020, 12:21 PM

Get a Mac 3 port for cheap and get it tuned for it. Stock ones commonly go bad.

NicMonte · 02-26-2020, 06:29 PM

Or get the Cobb 3port and retune with their Stage2 ebcs map. Is the downpipe from Cobb?

kpm_777 · 02-28-2020, 12:29 PM

I would also check for boost leaks in your intake system, pull the intercooler and check the Y-pipe for sure. Sometimes leaks can do weird stuff like that.

02-24-2020, 12:42 AM	#1
Powsurfer96 Scooby Newbie Member#: 493872 Join Date: Nov 2018	Boost control problems 2003 wrx I took a data log today because my car had been feeling weird. The log shows my boost climbing up to 18psi (target) then it would drop down to about 10psi and climb back up To 18 again. It does this over and over through my pull. I could hear it leaking out like a blow off valve when it would drop. It’s a bugeye on a Cobb stage 2 map with a catted downpipe and Cobb intake. Where should I start troubleshooting? No obvious leaks that I could see. Can post up the log if anyone wants to see it. * Registered users of the site do not see these ads.

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02-25-2020, 02:34 PM	#2
Therumblebox Scooby Newbie Member#: 477751 Join Date: Nov 2017	Are you running the stock boost controller?

02-26-2020, 12:21 PM	#4
02hybridwrx Scooby Newbie Member#: 397139 Join Date: Jul 2014	Get a Mac 3 port for cheap and get it tuned for it. Stock ones commonly go bad.

02-26-2020, 06:29 PM	#5
NicMonte Scooby Newbie Member#: 479655 Join Date: Dec 2017 Location: Omaha Ne Vehicle: 2002 Impreza wrx Black	Or get the Cobb 3port and retune with their Stage2 ebcs map. Is the downpipe from Cobb?

02-28-2020, 12:29 PM	#6
kpm_777 Scooby Newbie Member#: 492460 Join Date: Oct 2018 Chapter/Region: BAIC Location: Bay Area, CA / Rapid City, SD Vehicle: 2019 WRX	I would also check for boost leaks in your intake system, pull the intercooler and check the Y-pipe for sure. Sometimes leaks can do weird stuff like that.