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Old 12-07-2005, 03:42 PM   #1
shutterbug
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Default Boost/fuel cut-off CEL, Stage1 STi

I wanted to get local opinion on an issue I have been experiencing:

Here is my (rather lonely) thread on the 2.5L powertrain forum

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Old 12-07-2005, 04:04 PM   #2
inveSTigator
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Hmmmmmmmm, if you were catless, I'd say Ah-Ha! But since your stage 1, I say . Good luck. Maybe Mika or somebody all-knowing will chime in.
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Old 12-09-2005, 01:32 AM   #3
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I have an update:

http://forums.nasioc.com/forums/show...8#post11936678

In a nutshell, I updated to v1.10 of the stage1 93oct map and did not experience fuel cut-off or CELs. I hit 18.4psi (according to the AP) in 5th gear, somewhere around 5500rpm.

shutterbug
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Old 12-09-2005, 09:19 AM   #4
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Sebastian - target boost for stage 1 map on STi is 16.5psi..... I think you're overboosting, which is not a good thing. May be a function of it suddenly getting cold and the computer not keeping up with the boost control, but I'd keep an eye out.

And get a boost gauge.
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Old 12-09-2005, 10:40 AM   #5
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Quote:
Originally Posted by gjhsu
Sebastian - target boost for stage 1 map on STi is 16.5psi..... I think you're overboosting, which is not a good thing. May be a function of it suddenly getting cold and the computer not keeping up with the boost control, but I'd keep an eye out.

And get a boost gauge.
I think you're right George. I am "guessing" that it might be the cold effect that you say. I was quite surprised myself that I am hitting almost 2psi boost over the stg1 target. I wonder if my K&N typhoon has anything to do with it? Even with the old map which I had for over 6 mos, this never happened until it got cold, so it has to be a major factor I think. What I might try and do is use the LWG (lower wastegage) map and see if that brings things back to the mid 16 levels.

Now, regarding the boost guage, I am finally convinced that I need one. Do you have any recommendations? I would prefer one that has PSI.
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Old 12-09-2005, 10:42 AM   #6
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I've got the OEM one, which is fine. Doesn't read in PSI, but .1+1-tick would be target. You don't have to spring for the fancy ones, since, if it works, it works.

I didn't realize you were running the HWG map, in which case, yes, if you're overboosting, definitely go to the regular map.

Oh, and I parked next to you. You should take a picture, it's cute
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Old 12-09-2005, 10:47 AM   #7
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Quote:
Originally Posted by gjhsu
Oh, and I parked next to you. You should take a picture, it's cute
My camera phone does not have an "L" lens on it, so unfortunately I cant.

One of these days, we need to get all the subies lined up in the carpark and take a few shots.
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Old 12-09-2005, 10:48 AM   #8
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Quote:
Originally Posted by shutterbug
My camera phone does not have an "L" lens on it, so unfortunately I cant.

One of these days, we need to get all the subies lined up in the carpark and take a few shots.
That was 2 days ago, right in that third floor corner. You, me, David, Steve, then a couple cars down, Kevin's Forester.
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Old 12-09-2005, 11:12 AM   #9
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Quote:
Originally Posted by inveSTigator
Hmmmmmmmm, if you were catless, I'd say Ah-Ha! But since your stage 1, I say . Good luck. Maybe Mika or somebody all-knowing will chime in.

Me, all-knowing? Now that'd be a sad world to live in!

Try putting the stock airbox back on. That could be the cause of it overboosting. PO244 code present?

Read your other thread. It could also be the hwg map that you flashed your car with. Try flashing a regular stage 1, 93 octane map on it first before you start yankin' intakes off and putting regular airboxes in.


Mika
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Old 12-09-2005, 12:09 PM   #10
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Quote:
Originally Posted by shutterbug
My camera phone does not have an "L" lens on it, so unfortunately I cant.

One of these days, we need to get all the subies lined up in the carpark and take a few shots.
If you'd ever come to a HH we could take some shots there too, drinking or picture wise
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Old 12-09-2005, 12:33 PM   #11
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Quote:
Originally Posted by LiquidIQ
If you'd ever come to a HH we could take some shots there too, drinking or picture wise
Kills the fun when he only drinks Fosters.
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Old 12-09-2005, 12:37 PM   #12
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I have had the same problem at 23#'s in 5th on the track, turn your boost down quickly.
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Old 12-09-2005, 01:54 PM   #13
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Quote:
Originally Posted by gjhsu
That was 2 days ago, right in that third floor corner. You, me, David, Steve, then a couple cars down, Kevin's Forester.
Yeah, that would be sooooo "cute"!
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Old 12-09-2005, 02:33 PM   #14
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Quote:
Originally Posted by gjhsu
I didn't realize you were running the HWG map, in which case, yes, if you're overboosting, definitely go to the regular map.
Actually I am running the "normal" map, there is a LWG, normal and HWG. From what I read, the "normal" map changes the fuel cut-off to 20psi, so should I be worried about hitting 18.4psi in 29deg cold?

I suppose I can try the LWG map and see if that brings me back to the mid 16's.

I am sure my intake may have something to do with it, but frankly I like the Typhoon over Cobb's intake. The Cobb intake doesnt appear to "sit" as well. I think the only reason Cobb say not to use other SR intakes is because they want to sell theirs. There, I put my $0.02...

Seb
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Old 12-09-2005, 02:55 PM   #15
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I'd just run the stock box. It's plenty great.
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Old 12-09-2005, 05:42 PM   #16
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Quote:
Originally Posted by gjhsu
I'd just run the stock box. It's plenty great.
I have toyed with the idea of just putting the stock box back in and selling the K&N ... it would also mean that my wife would not have to put up with a relentless "wooshing" sound. Decisions, decisions ...
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Old 12-09-2005, 05:52 PM   #17
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It's not the Typhoon.
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Old 12-10-2005, 03:05 PM   #18
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I have a stock WRX and I am hitting 19 and 20 PSI in 2 and 3 gear! What is going on? I think our Texas cars are not use to the cold! But I got a cell getting on the freeway so I'm sure that means I hit the fuel cut. I just saw this thread but I posted a new one too.
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Old 12-11-2005, 08:41 PM   #19
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I have an update on my high-boost "problem":

http://forums.nasioc.com/forums/show...8#post11960998

Any comments would be appreciated. If this is considered "cross-posting" let me know and I wont do it anymore.
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Old 12-11-2005, 09:45 PM   #20
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see my post in the other thread.
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Old 12-11-2005, 09:49 PM   #21
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I'm sure people get mad about cross posting but sometimes that is the only way to get the info you are looking for.

If you look at my other post before I got the CEL, I was having the same noise.
http://forums.nasioc.com/forums/show...ise+full+boost
I think maybe you should replace the vacuum lines. It was only $2 a foot for the good stuff.
It may or may not help but it seemed to fix my problem.
Matt
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Old 12-11-2005, 11:10 PM   #22
shutterbug
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I took out the Typhoon and put in the stock box. Results:

- Car is quiter, although there is still a feint "woosh" to be heard
- Still hitting high 17's psi

See other thread for details:
http://forums.nasioc.com/forums/show...7#post11962217

BTW, I am going to offer my Typhoon for sale since I dont think my Cobb stg1 needs it. It has less than 10K mi on it and is mostly assembled. If you are interested (before I post it up FS, just PM me).

Cheers
Seb
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Old 12-12-2005, 12:09 AM   #23
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Quote:
Originally Posted by ATXWRX
It may or may not help but it seemed to fix my problem.
Matt
Matt, do you have a picture of the hoses you replaced? Or perhaps describe it to me. Besides the hose replacement, I am going to try the LWG (lower wastegate duty-cycle) map. If this doesnt fix it, there must be a leak somewhere.

BTW, the Typhoon is on sale:
Here is the link to the appropriate thread

Last edited by shutterbug; 12-12-2005 at 09:42 AM. Reason: removed price
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Old 12-12-2005, 09:11 AM   #24
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I don't have my camera with me today. I will take a pic of it when I get home. The line has a fabric on the outside that is braided and it is the same thickness as the stock. They also have a rubber inter coating. They also fit better or they feel like they do.
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Old 12-12-2005, 09:15 AM   #25
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Seb, edit the sale price off your post b4 the thread gets locked. I think the link to the sale is o.k. though. ?
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