2003 wrx looses boost

Ebal · 11-12-2012, 08:54 PM

I am experiencing problems with loosing boost towards 4500 rpm the car will go from 16.5 to 10 and hold at ten pounds any help would be appreciated thank you.

jthatch12 · 11-12-2012, 09:19 PM

Quote:

Originally Posted by Ebal

I am experiencing problems with loosing boost towards 4500 rpm the car will go from 16.5 to 10 and hold at ten pounds any help would be appreciated thank you.

Normal . boost will taper down as you get closer to redline. My car hits peak(20 psi) at 3k and tapers down to 11 at redline

WhiteBgeye02 · 11-12-2012, 09:23 PM

^ i hope yours is tuned for that. as far as the taper it should hit 12 around 5600 and then to ten above 5800 rpms according to a stock wrx rom target boost map. do a boost leak test. some basic searches on here will help!

jthatch12 · 11-12-2012, 09:26 PM

Quote:

Originally Posted by WhiteBgeye02

^ i hope yours is tuned for that. as far as the taper it should hit 12 around 5600 and then to ten above 5800 rpms according to a stock wrx rom target boost map. do a boost leak test. some basic searches on here will help!

Of course I'm tuned for it! lol. My brother in law and I tune our scoobs ourselves. I'm currently at 231 whp and 244 ft/lb.

Ebal · 11-12-2012, 09:36 PM

I am currently running the cobb stage 2 with catless exhaust and cobb ebcs

HinshawWRX · 11-14-2012, 07:20 PM

Quote:

Originally Posted by Ebal

I am currently running the cobb stage 2 with catless exhaust and cobb ebcs

Curious how you are running Stage 2 tune with an EBCS as the EBCS is not supported for your tune. Unless yo are running a protune by cobb. Likely this is PART of your problem.

Ebal · 11-12-2012, 09:37 PM

It was doing fine then all the sudden it started is it possible that it could be a exhaust leak per turbo?

WhiteBgeye02 · 11-12-2012, 10:05 PM

no boost leak post turbo pre engine is prob whats up! do a boost leak test and go from there! make sure no post maf leaks between the turbo and the maf as well. the turbo inlet is known to leak/rip

to jthatch12. thats it? my ej205 on 93 mad 250whp and 280wtq from my own personal tune. went to 280/315 on e85!

post back after you do the leak tests. its something everyone should do on there car once a year at the very least! my guess is there is a leak because that little of boost up top is not what the map calls for it i remember correctly

Ebal · 11-12-2012, 10:10 PM

I have all new hoses coming tomorrow for my intercooler I already have a new turbo inlet Perrin what kind of boost leak can I do

jthatch12 · 11-12-2012, 10:13 PM

Quote:

Originally Posted by WhiteBgeye02

no boost leak post turbo pre engine is prob whats up! do a boost leak test and go from there! make sure no post maf leaks between the turbo and the maf as well. the turbo inlet is known to leak/rip

to jthatch12. thats it? my ej205 on 93 mad 250whp and 280wtq from my own personal tune. went to 280/315 on e85!

post back after you do the leak tests. its something everyone should do on there car once a year at the very least! my guess is there is a leak because that little of boost up top is not what the map calls for it i remember correctly

On the TD04? I'd like to see some of your roms if you still have them around. I'm not done fully tuning yet, just hit a milestone

Ebal · 11-12-2012, 10:16 PM

I also have a friend coming tomorrow with a vacum pump to check the wastegate

Ebal · 11-13-2012, 06:10 PM

Ok so I had no idea of how to check for leaks I sea foamed my car and smoke come from the passenger side near the timing belt cover maybe lower than that near the header please help

Travisty · 11-13-2012, 06:51 PM

Quote:

Originally Posted by Ebal

Ok so I had no idea of how to check for leaks I sea foamed my car and smoke come from the passenger side near the timing belt cover maybe lower than that near the header please help

Head-to-manifold gasket, or the up pipe gasket.

Ebal · 11-13-2012, 07:22 PM

Would those gaskets just go out at once

Travisty · 11-13-2012, 07:39 PM

Quote:

Originally Posted by Ebal

Would those gaskets just go out at once

Gaskets do fail with age, although it's rare. They're cheap and easy to do, so do them. Order some proper gaskets from some place like Rally Sport Direct, not some crap Ebay fiber things.

I always buy gaskets with a fire ring, and I suggest you do as well.

Ebal · 11-13-2012, 08:39 PM

Got them ordered I will install in a few days I think that it is the pass side one cuz when I stand with the hood open and rev it has a small backfire it sounds like it is coming from there

Ebal · 11-14-2012, 06:55 PM

Well I took the uppipe off and bam a gasket was missing a 1 inch chunk out of it

Ebal · 11-14-2012, 08:19 PM

What would that do

jthatch12 · 11-14-2012, 08:22 PM

Quote:

Originally Posted by HinshawWRX

Curious how you are running Stage 2 tune with an EBCS as the EBCS is not supported for your tune. Unless yo are running a protune by cobb. Likely this is PART of your problem.

^this

Ebal · 11-14-2012, 08:28 PM

I know but why would it run fine then a few days later not have the consultancy and how could that have anything to do with a gasket.

Ebal · 11-14-2012, 09:48 PM

Consisting

11-12-2012, 08:54 PM	#1
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	2003 wrx looses boost I am experiencing problems with loosing boost towards 4500 rpm the car will go from 16.5 to 10 and hold at ten pounds any help would be appreciated thank you.

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11-12-2012, 09:23 PM	#3
WhiteBgeye02 Scooby Specialist Member#: 224785 Join Date: Sep 2009 Chapter/Region: MWSOC Location: neenah Vehicle: 2005 wrx-jdm207 i went black...	^ i hope yours is tuned for that. as far as the taper it should hit 12 around 5600 and then to ten above 5800 rpms according to a stock wrx rom target boost map. do a boost leak test. some basic searches on here will help!

11-12-2012, 09:36 PM	#5
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	I am currently running the cobb stage 2 with catless exhaust and cobb ebcs

11-12-2012, 09:37 PM	#7
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	It was doing fine then all the sudden it started is it possible that it could be a exhaust leak per turbo?

11-12-2012, 10:05 PM	#8
WhiteBgeye02 Scooby Specialist Member#: 224785 Join Date: Sep 2009 Chapter/Region: MWSOC Location: neenah Vehicle: 2005 wrx-jdm207 i went black...	no boost leak post turbo pre engine is prob whats up! do a boost leak test and go from there! make sure no post maf leaks between the turbo and the maf as well. the turbo inlet is known to leak/rip to jthatch12. thats it? my ej205 on 93 mad 250whp and 280wtq from my own personal tune. went to 280/315 on e85! post back after you do the leak tests. its something everyone should do on there car once a year at the very least! my guess is there is a leak because that little of boost up top is not what the map calls for it i remember correctly

11-12-2012, 10:10 PM	#9
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	I have all new hoses coming tomorrow for my intercooler I already have a new turbo inlet Perrin what kind of boost leak can I do

11-12-2012, 10:16 PM	#11
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	I also have a friend coming tomorrow with a vacum pump to check the wastegate

11-13-2012, 06:10 PM	#12
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	Ok so I had no idea of how to check for leaks I sea foamed my car and smoke come from the passenger side near the timing belt cover maybe lower than that near the header please help

11-13-2012, 07:22 PM	#14
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	Would those gaskets just go out at once

11-13-2012, 08:39 PM	#16
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	Got them ordered I will install in a few days I think that it is the pass side one cuz when I stand with the hood open and rev it has a small backfire it sounds like it is coming from there

11-14-2012, 06:55 PM	#17
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	Well I took the uppipe off and bam a gasket was missing a 1 inch chunk out of it

11-14-2012, 08:19 PM	#18
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	What would that do

11-14-2012, 08:28 PM	#20
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	I know but why would it run fine then a few days later not have the consultancy and how could that have anything to do with a gasket.

11-14-2012, 09:48 PM	#21
Ebal Scooby Newbie Member#: 337115 Join Date: Nov 2012	Consisting