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ScoobySnax 10-04-2012 07:52 PM

AccessPORT low boosting
So I have a 2005 Legacy GT with an SPT intake and Cobb AP. Every once in a while the boost drops and it runs sluggish. Now I started to monitor the boost and it was 8.8lbs tonight. Now it will usually go back to normal when I reflash it but I dont feel I should be having to reflash every week.

Does anyone have any idea or any experience with this.

Sorry if it has been posted before, I have been searching for the past 30min today and many times in the past.

Oh yea, I got the AP back in May 2012 and this started happening around late Aug 2012

chaz517 10-04-2012 07:55 PM

Does limp mode kill boost like this? That could be it

ScoobySnax 10-04-2012 07:58 PM

what is limp mode

Nrw 10-04-2012 07:59 PM

boost leak test

ScoobySnax 10-04-2012 08:02 PM

I dont think its a boost leak because it goes back to normal when I reflash it again

chaz517 10-04-2012 08:12 PM

Limp mode is pretty much when the car senses something isnt running right and reduces power to prevent damage. Flashing the ecu every week to fix it probably is not a good idea, but again not sure if thats what is going on w ur car right now. Check all your hoses just so u can cross that off ur list

EJ25subie05 10-04-2012 08:15 PM

sounds like a boost leak to me. are you tuned for that intake? my intake caused me more problems then i knew what to do with and took it off and set it on my table ever since. waiting for a pro tune

ScoobySnax 10-04-2012 08:35 PM

hmm, do you think I should divorce the AP to see if it helps until I get it pro tuned

EJ25subie05 10-04-2012 08:41 PM

you didn't say anything about a dp or anything so I'm assuming your only on stage 1? put your stock intake back on, and if the mods you have allow you to go back to stock then divorce the AP and see if the problem still occurs. are you using your AP to monitor boost or a gauge?

ScoobySnax 10-04-2012 08:53 PM

yea, just stage 1 for now. I was using the boost controller on the AP. I think im gonna take your advice and go back to completely stock tomorrow. I hope it works.

Do you think I should reflash to correct it then divorce it???

cryo 10-04-2012 10:00 PM

Normally the ap alone should not cause these issues. It may be something mechanical causing the ignition advance multiplier to drop thus wastegate boost.

Pull up your live monitors and look at dynamic advance multiplier or DAM while you are seeing the 8.8 psi issue. Is it less than 1.0?

Its hard to say without some logs but stg 1 is normally pretty strait forward.


Berzerklo 10-05-2012 10:46 AM

Those SPT intakes are notorious for messing with your MAF readings.

ScoobySnax 10-05-2012 02:39 PM

I took off the AP for now and putting the stock intake back on this weekend. If everything goes well then Im gonna try the AP again in 2 weeks. I hope I will have good news by then.

Thanks Dave, Im gonna post the data when I try again in 2 weeks cuz I didnt see your post before I took it out.

I really appreciate all the quick responses. This is my first Subaru and first time using forums for help. The Subie family is really a great family.

cryo 10-08-2012 01:19 PM

There are great members on this forum, its the best online community i have had the pleasure of being a part of.

Keep us updated.


cryo 10-17-2012 08:09 PM

Any updates?


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