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Old 03-14-2013, 12:27 AM   #1
westonanderson25
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Member#: 348854
Join Date: Mar 2013
Chapter/Region: MWSOC
Location: mn
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2002 WRX
Rally Blue

Default boost problems

I have a 2002 impreza wrx and have been having problems. when i accelerate 85 percent of the time i am only getting what seems to be half power and when i get higher in the rpm range i can hear the turbo spooling up and down its not a solid spool like it is spose to. any thing will help thanks
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Old 03-14-2013, 12:34 AM   #2
warpath
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2010 EVO X GSR
1992 MKIII Supra

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Quote:
Originally Posted by westonanderson25 View Post
I have a 2002 impreza wrx and have been having problems. when i accelerate 85 percent of the time i am only getting what seems to be half power and when i get higher in the rpm range i can hear the turbo spooling up and down its not a solid spool like it is spose to. any thing will help thanks
I got 99 problems but boost ain't one...

Could be a loose intercooler piping coupling. When they get loose or crack you will lose boost.
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Old 09-03-2013, 08:43 PM   #3
emphrum26
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Brilliant Silver

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I am having the same issue on my 05 wrx. I captured a datalog, but I am new to reading them. Hopefully someone could give me some insight?

-Mods-
*Cat-back
*up-pipe
*AP stage 1 91 tune

[IMG][/IMG]
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Old 09-03-2013, 10:27 PM   #4
DZXN
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2002 Subaru WRX
PSM

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Post a full log on google docs, all we can see from your screen cap is 2k-<3k and that you are missing your right click button on your computer. Set the doc to public and allow everyone to see it.

Read this

http://www.romraider.com/forum/viewt...hp?f=33&t=5384
to help you understand what to log (and not to log Gear, Knock active etc)
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Old 09-04-2013, 03:20 AM   #5
brew02wrx
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Location: brewster, NY
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2002 wrx cobb stg2+
psm proper fitment

Default

Quote:
Originally Posted by westonanderson25 View Post
I have a 2002 impreza wrx and have been having problems. when i accelerate 85 percent of the time i am only getting what seems to be half power and when i get higher in the rpm range i can hear the turbo spooling up and down its not a solid spool like it is spose to. any thing will help thanks
a boost gauge will help you, a data log will help us. full boost on an untuned wrx is 13.5psi, on a cobb stage 2 OTS map it's 16psi....just for reference
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Old 09-04-2013, 03:23 AM   #6
brew02wrx
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psm proper fitment

Default

Quote:
Originally Posted by emphrum26 View Post
I am having the same issue on my 05 wrx. I captured a datalog, but I am new to reading them. Hopefully someone could give me some insight?

-Mods-
*Cat-back
*up-pipe
*AP stage 1 91 tune
you need to get a better screen of your datalog, do what the above poster said....upload it to google docs and post the link for us to read. However the first thing i noticed is you aren't 100% throttle in your log, you should be...you're at 98%, make sure the pedal is completely to the floor when you get logs. Also take the log doing a pull in 3rd gear with the stock 5 speed.
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Old 09-05-2013, 09:45 PM   #7
emphrum26
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Brilliant Silver

Default

Thank you for your above input and I will read that link, like I said, I'm rather new to this.

Here is the link to my Google Doc:

https://docs.google.com/spreadsheet/...3c&usp=sharing

As for my throttle position, I was pegged to the ground...maybe this weekend I can post a better log once I read the "how to".
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Old 09-06-2013, 12:08 AM   #8
Jubert69
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04 WRX
ej207 spec C 18g

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Quote:
Originally Posted by emphrum26 View Post
I am having the same issue on my 05 wrx. I captured a datalog, but I am new to reading them. Hopefully someone could give me some insight?

-Mods-
*Cat-back
*up-pipe
*AP stage 1 91 tune

[IMG][/IMG]
.... your FLKC is out of control.

Take it to a tuner and check for any lose parts in your engine bay that is causing a knock sound. Your car is removing 10 degrees of timing.
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Old 09-06-2013, 12:19 AM   #9
nmlittlebigman
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WRB

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Your DAM is at zero! It can't go any lower and your ecu is still pulling timing Your log also shows that you are running lean (AF Learning C range at +12 and AF corrections on top of it!). MOST LIKELY YOUR PISTONS ARE SEEING REAL KNOCK. Are you running stock intake or aftermarket?

First do a boost leak test and make sure you don't have any loose or torn hoses.
NO more pulls right now.

Last edited by nmlittlebigman; 09-06-2013 at 10:09 AM. Reason: clarification
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Old 09-06-2013, 12:23 AM   #10
Chicago AJ
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'13 Prius C 86mpg!

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Quote:
Originally Posted by Jubert69 View Post
.... your FLKC is out of control.

Take it to a tuner and check for any lose parts in your engine bay that is causing a knock sound. Your car is removing 10 degrees of timing.
Something loose/rattling around would be seen on feedback knock, I'm pretty sure.
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Old 09-06-2013, 04:55 PM   #11
emphrum26
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Brilliant Silver

Default

As far as my intake, its stock. I just put a drop in ait filter in. Sence the log I detuned back to stock map and am boosting normally now. I have checked hoses and found nothing yet. I haven't done a full boost leak check yet
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Old 09-06-2013, 08:37 PM   #12
emphrum26
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Brilliant Silver

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Could this be caused by fuel? This issue started the day after I filled up.
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Old 09-06-2013, 08:57 PM   #13
nmlittlebigman
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WRB

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Quote:
Originally Posted by emphrum26 View Post
Could this be caused by fuel? This issue started the day after I filled up.
Yes...but your fuel trims are way off too so that's why I was thinking possible mechanical problem e.g. intake tract leak, dirty or failing maf sensor, bad o2 sensor, fueling system etc.
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