guroove

It sounds like your wastegate actuator needs adjustment.

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2005 Obsidian Black Pearl XT w/4eat

Galager

It would also be nice to know, model year, manual/auto, v1 or 2 AP, etc. Did you hit the rev limiter?

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'05 XT 5 spd with the fast paint.

KeNd0

2007 FXT AT V2 stg 1 91 octane map and Im sure it hit the rev limiter as well, as I seen the needle bounce just past 7000.

Everything I`ve been reading on this particular error code on cobbs site says i may need to fiddle with the restrictor pill. Seeing as I cant pull any logs yet, cant get the ap cable to work with ecuexplorer, I was hoping someone else had experienced this as well.

guroove

I would adjust the wastegate actuator before swapping out restrictor pills. The line or restrictor could also just need to be cleaned. Actually, this is what I would do:

1) clean out the vacuum line that has the restrictor pill with some WD-40 then try to blow out as much of it as you can with some compressed air.

2) do some full throttle pulls and see if you over boost again.

3) loosen the wastegate actuator if you are still over boosting.

If you loosen it all the way and you are still over boosting, you may need to drill out the pill, or there may be something wrong with your bcs or turbo.

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2005 Obsidian Black Pearl XT w/4eat

KeNd0

Someone suggested trying the 91 acn map. From what I gather from your post, you seem to think its more a hardware issue. rather than map based?

guroove

If you are running 91 or 92 octane fuel, then by all means use the 91 octane map. The 91 octane map could be an easy fix to your problem, but it could also hide a hardware problem. Cobb maps are pretty conservative and really shouldn't be sending you into overboost like that. I run the 93 octane map, and I'm at sea level, and have never had a CEL from my stage 1 setup. I think that if the ECU is detecting a wastegate actuator problem, then it is best to get that straightened out before you do serious damage to your engine. If you do indeed have deposits clogging your restrictor pill, the clog could get worse, and you could have more boost control problems in the future.

I would only switch to the 91 octane map if the ECU was retarding ignition due to knocks being detected. It may prevent it from overboosting, but the boost should not be getting that high by your current map.

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2005 Obsidian Black Pearl XT w/4eat

Galager

Your AP cable will not work for logging. I would suggest getting your hands on a tactrix cable and logging. I logged my AP stage 1 and found I was not hitting target boost of 13.5. I used the pill to get my boost up to 13.5, but had to adjust the map to compensate for the pill.

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'05 XT 5 spd with the fast paint.

ringer

kendo,
did you notice where the stage 1 notes specifically state "stock intake with stock airfilter only"....the put that in there for a reason. the k&n may be the whole cause of your problem.

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07 FSXT
Stage II
Prodrive Muffler
Swifts

KeNd0

I`ll look for the post. Someone here emailed Cobb about K&N drop in filters. I believe the reply was the drop ins would be fine, the CAIs with the cone filters would be a problem.

Either way I have the filter here, and I can try it, I just dont think its the problem.

Integrity Performance

That is just a CYA move on Cobbs part.

The reality is that any replacement panel filter, and WELL designed short ram intake will work.

So the SPT intake works, the K&N typhoon works, the Cobb short ram works (obviously). The APS 65mm cai has worked well on several cars I have worked with.


You have to understand that Cobb is VERY anal retentive about their stuff. (which is both why their stuff takes a long time to come out, and why when it does come out, its such quality) They even have deatschwerks make special sets of injectors for their off the shelf maps (they just calibrate them to be even closer match to their desired size).
They havent tested their OTS maps with every intake out there, only the stock one and theirs. SO they cant say that other intakes will work without causing problems. Because there are a lot of garbage intakes out there, and if they said other intakes are ok, they open themselves up for PO'd customers.
I dont know if this was considered on their part, but its also a great move from a business standpoint. Sell people an engine management system, tell them the ONLY intake that is safe is theirs, and they will buy the intake from you Like I said, I dont know if that was part of the plan, but it does work nicely that way
The up side is that their intake is VERY good when combined with their heatsheild/box, and is priced well. So if you want an intake, and dont want to go another way, their intake is a very good option.

As far as cone filter equipped intakes, their own intake has a cone filter, and is specified to work on their OTS maps

KeNd0

I swore I already posted this, but here goes.

Checked my lines and pill. Very clean no restrictions. Tore the hose pulling it off(was in a hurry doh!) Carefully replaced pill, and hose. Took the car for a spirited drive down the highway. No cels. I am hitting just below 100kpa, maybe a hair below, on the guage, and staying there.

Everything seems to be in the norms for values in the AP for Live Data.

I dunno

KeNd0

Well this morning did it again to me twice, while merging onto a busy highway. Went back to stock for now. too much running around to do this weekend to play with it.

ringer

from cobbs website....how to check if it is a mechanical problem with the boost control system

"How can I test for this with my AccessPORT?

You can flash a Realtime Economy Mode calibration which turns your boost control system off so it will run the minimum mechanical boost pressure, which should be 5-7psi for the 2007 WRX and 8-12 psi for the 2007 STi. Using the boost measurement feature of your new AccessPORT, you can see if you exceed the mechanical wastegate spring pressure. If you operate your vehicle while under wide open throttle conditions with the Economy Mode calibration and you notice your boost levels greatly exceed these mechanical pressure levels then you will have to mechanically revise your boost control system, see below."

flash the econo map, get on it, and see if you're showing boost running past 7psi.

here is the entire page...says it's typically a problem if running a catless exhaust on stage 2, but may be relevant....

CobbTuning.com - Service Bulletin: 07 WRX/STi Overboosting with Catless Exhaust

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07 FSXT
Stage II
Prodrive Muffler
Swifts

KeNd0

Well drove all day yesterday and this AM on stock map. No overboosting - seems to be in the normal values. Ill try the economy map Tuesday and see how it does.

guroove

Kendo, I would pay attention to the trouble code. It really sounds like there is something wrong with the wastegate actuator solenoid. The stage 1 tune calls for a very aggressive wastegate duty cycle. It sounds like for some reason the wastegate is getting stuck closed. It is one of those problems that is caught between map related and hardware related. Your map works on other cars with the same hardware, but is causing a problem on yours. A good professional tune would probably run a lot better, but IMO is a waste on a basically stock vehicle. I would imagine that the problem could go away with a stage 2 setup, but still shouldn't be ignored. How much does a new wastegate solenoid cost? Is your car still under warranty? It probably is voided due to the stage 1 mod, but I don't know if the dealer can tell if it's stage 1 or not. I know, it's not 100% ethical, but I'm just throwing it out there as a possible option.

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2005 Obsidian Black Pearl XT w/4eat