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Old 05-05-2005, 07:42 PM   #1
Cadaver
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Angry New Accessport Weird Problem

Just received my Cobb Accessport today and am running the Stage2-93Oct-Injen CAI base map. I can't see a huge power difference, but there is a little (not $550 worth). Acceleration is much more smoother throughout the entire range (which is awesome), but here is the problem... I'm backfiring like a sum-beotch. It's not every time I let off the gas, but if I'm running higher RPM (low to high boost) I'll backfire every few times. If it's noticeable from within the car (stereo on), I can only imagine the db's outside.

I was under the impression that the accessport balanced the air/fuel (run me leaner) and would also up the boost... is this right or am I just a retard? Also, what are the boost levels I should be achieving in each gear because I think I'm not boosting at normal levels.

Thanks
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Old 05-05-2005, 08:26 PM   #2
shinsain
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First, check Cobb's site. That will give you all the knowledge you need. http://www.cobbtuning.com

Second, even with the Injen map, ditch the CAI.

Third, it does work over the AF and boost levels, you shouldn't be backfiring.

Fourth, for a Stg 2 you should be hitting 15.8psi max.

Fifth, try the 91 octane map, maybe this will help.

Sixth, if none of that helps, email/post on Cobb's board/call Cobb.

Aaron
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Old 05-05-2005, 09:13 PM   #3
Cadaver
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Question Will Do... BUT?

Will Do...

Why remove the CAI?

Thanks

Last edited by Cadaver; 05-05-2005 at 09:14 PM. Reason: Question Addition
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Old 05-05-2005, 09:39 PM   #4
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Quote:
Originally Posted by Cadaver
Why remove the CAI?
For a couple reasons:

1.http://forums.nasioc.com/forums/show...hreadid=477393

2.http://www.cobbtuning.com/wrx/access...2091%20oct.txt
(Look at the "additional notes" part.)

3.http://cobbtuning.com/wrx/accessport-faq.html
(scroll down to the question about "I have XYZ intake, do you make a map for it")

Then, read all of this, just for general knowledge...
http://forums.nasioc.com/forums/showthread.php?t=533787

Then read the rest of these, to help get you started....
http://forums.nasioc.com/forums/showthread.php?t=170789


Even though Cobb makes the map for the Injen, it still is not what they recommend. Some say its ok to use an intake w/ an AP, and that they recommend against using them because they are coming out with their own intake and want you to use theirs....I think its a little less nefarious than that. I think that they are just hard to tune for because they are all different, hence not wanting to make a million different maps for every different intake out there.

Aaron
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Old 05-05-2005, 10:47 PM   #5
majmun
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Do you have a BOV?
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Old 05-05-2005, 10:58 PM   #6
Striker13
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Do you have a turboback?
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Old 05-05-2005, 11:43 PM   #7
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Are you able to run a bov with the stage 2 map for 93???
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Old 05-06-2005, 01:51 AM   #8
Cadaver
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Angry My Setup

Update: Verified that my boost gauge was correct by using the boost monitor on the AP. Here are my peak boost numbers:

1st: 7
2nd: 7
3rd: 10.9
4th: 10.7
5th: ????

I have tried all the stage2 maps and nada changes. I also can only change the base map. When I use a realtime map, it says its successful but still shows the base map. I've tried the various types of spooling the turbo including dogging the piss out of it to redline... its just running stock numbers. CAI or not, my boost levels would peak higher than this regardless of turbulence, too much air, etc. I've sent email to Cobb and also posted on their forum but those members answer questions with questions...

For those of you asking what I have...

04' Wrx - Sub/Blue
Injen CAI
Injen up/down/crossover
Injen TBE
Gauges - boost/egt/oil pressure
16" Konig Incidents
245/50/16 BFGoodrich Gforce T/A KDW
A Partridge in a Pair Tree
and 1 Accessport that doesn't seem to be working right...
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Old 05-06-2005, 02:03 AM   #9
shinsain
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Try the Stg 2 ******HWG 91 Oct***** map

That map is for people who aren't hitting target boost numbers.

If that works, ditch the CAI and go w/ that map.

If not, try making sure your wastegate isn't fouled up somehow, and that all of its lines are properly connected. Also, make sure that the line "T"'d off of your BOV to your boost gauge is tight, and that the BOV and all connecting lines/pipes are tight.

In other words, if the HWG map doesn't work, look for leaks.

Aaron
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Old 05-06-2005, 02:42 AM   #10
Cadaver
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Default Hwg

I'll try that map... even though I'm a little leary about it since they have that "use at your own risk" message on the website. I guess If I monitor the boost close I should be okay. I'll update afterwards... btw, did you catch the part about the realtime maps? Any ideas why that would happen?

Also, thanks for all of your thoughts/ideas...
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Old 05-06-2005, 03:13 AM   #11
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The AP only displays the current BASE map, not the realtime map. (in the manual as well as the AP knowledge base.)

You need to drive with the map flashed for a little while to allow the ecu to learn the boost targets. if after a few days (hundreds of miles) you are still boosting low, flash the HWG map and see if it helps.
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Old 05-06-2005, 04:12 AM   #12
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For time being I will wait and see what happens... maybe I'm just too anxious and am expecting results to quick. And your right Crawdads... right there on page 14 in black and white :P

I'll keep you posted on my results... hopefully it'll get out of this rich condition quick.. gas ain't cheap anymore LOL
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Old 05-06-2005, 04:29 AM   #13
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i went to ecutek from cobb 2.5- i'm making a lot more power and getting 4 more mpg- i went from 16 to 20. also, no more backfiring- i was backfiring ALL the time with cobb.
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Old 05-06-2005, 11:01 AM   #14
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A good point was made to me and I actually saw something similar before. Being that I'm in Houston and pretty much at sea level and high humidity, how would this effect the maps that are not made under these conditions?

Second, how exactly is the boost regulated. Were in debate over here with some saying that the AP can only determine max boost and the ECU controls it.. the others saying that the AP determines boost. Can anyone clarify on this?

Also, if I'm just not getting the boost levels that I'm supposed to, can't I just get a boost controller as a simple solution? As you can see, I'm new to turbo's and learning as I go...

Thanks
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Old 05-06-2005, 11:11 AM   #15
shinsain
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Your boost it way too low for the ECU to need time to "learn" it. If you were running like 13-15psi, I would say "give it a day or three" but you're running like 10, so something's def. wrong.

The maps will be fine for sea level.

Boost is regulated by the ECU itself. This is because the AP does not "regulate boost" per se....it reflashes the ECU (just resetting all of its parameters) and the ECU takes care of all functions thereafter. This is why the AP is a safe choice, because you aren't able to equal the stock ECU's capabilities until you pay a LOT of money for an equal aftermarket ECU. Its just that the stock tuning of the ECU is for specific goals that Subaru needs to meet such as emmissions and fuel economy becuae not everyone who buys a WRX wants to tune it.

Also, go back and read the links I posted, most of your noob questions can be answered via those.

The boost controller is not really needed, especially w/ the AP and you still risk PTFB conditions with it.

Aaron
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Old 05-06-2005, 11:46 AM   #16
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Quote:
Originally Posted by earlmale
i went to ecutek from cobb 2.5- i'm making a lot more power and getting 4 more mpg- i went from 16 to 20. also, no more backfiring- i was backfiring ALL the time with cobb.
Some of us do not have a choice. No 4-wheel dynos or tuners in the area
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Old 05-06-2005, 11:58 AM   #17
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okay, best question yet. If I send this back, can anyone recommend a good tuner in Houston? Im sure there is at least a few...

So much for the safe/easy way...
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Old 05-06-2005, 02:09 PM   #18
shinsain
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Have you even tried the HWG maps from Cobb? You're not the first person to have this problem. Also, have you even contacted them??

If you do decide to send it back, talk to FIS in Dallas, they're probably going to be much better than anything in Houston.

Aaron
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Old 05-06-2005, 03:09 PM   #19
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No, I'm leary about using the HWG maps because of the "use at your own risk" (plus Cobb hasn't told me to). When I spoke with Cobb, the response that I got was I have to have the stock restrictor pill. There is a restrictor there, however I don't know what the factory one looks like... was about to look around and find a pic. I really don't see why the restrictor would cause such an issue... but I'm looking anyway just to cover all avenues Cobb suggests. If anyone has a pic, by all means post it on here. BBS...
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Old 05-06-2005, 03:19 PM   #20
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another reason I haven't got to the HWG map is because everyone keeps saying "you need to run that map for a few hundred miles to let the computer learn"... blah
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Old 05-06-2005, 04:02 PM   #21
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Could you do the advanced part of the Vishnu reset? It worked for me. I went from 11psi of boost to 15.8psi like it should have been hitting.
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Old 05-06-2005, 04:04 PM   #22
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Nah, nah. The HWG map works fine. Many people on nabisco and who post on Cobb's board use it with success.

Also, the restrictor pill is in one of the WG lines. Its a little brass pill inside of the line to moderate airflow to the solenoid (I think its to the solenoid anyway...I forget...anyway...) You can feel it inside the rubber vacuum hose. Just cop a feel on the WG hoses and you should find it. If you bought your car new, and didn't do anything with the WG, you will be fine.

You didn't do the 3/16th mod did you? That may be what Cobb is talking about.

And as for the learning, had you tried it, you would have known by now! Its a little faster than that. Your ECU will "learn" the boost settings and driving style eventually, but parameters are pretty much there once you load the map. It will take that long to get the ECU to "fine tune" itself to the car, the gas, and your driving style, etc.
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Old 05-06-2005, 04:05 PM   #23
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Quote:
Originally Posted by sifl
Could you do the advanced part of the Vishnu reset? It worked for me. I went from 11psi of boost to 15.8psi like it should have been hitting.
And that's another good idea.
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Old 05-06-2005, 04:08 PM   #24
Cadaver
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Trey/Parker

I was on the phone with Parker and was disconnected (dern cell phones), but did get enough info from him to work with. The vacuum line from the wastegate "t's". The line that actually T's off (heading towards the passenter fenderwell has a restrictor in it (which is what I'm assuming that Parker was leading to). I researched and found a couple pictures and found out why they call it a "pill".. it's small and actually in the line. The one that I currently have is large clear and flat (looks like fuel filter but is flat with what appears to be a paper filter or diaphragm or something in it). Is this where the stock restrictor should be? If so, I'm wondering why this was installed when my Injen exhaust was installed... was it really necessary?

I also found a FAQ on your website about the restrictor pill and you actually supply it with your stage1 Accessport. If this is the case, can you supply me with the restrictor for the Stage2 Accessport?

I appreciate all the help everyone here and at Cobb is giving and actually think we're heading in the right direction now. I now realize how different this car is from my gravity fed gas guzzler...

Last edited by Cadaver; 05-06-2005 at 04:13 PM. Reason: typos
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Old 05-06-2005, 04:19 PM   #25
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HWG? is that Huge Waste of Gas? lol

TJ
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