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Old 06-26-2011, 09:24 PM   #1
Sublimejoe
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Default Choppy after AP: 06 OBXT

I put an accessport on my 06 Outback XT yesterday and it has stalled twice over the weekend. Idle is a little low and if I have the A/C on it comes pretty close to stalling when I stop at a light.

When I first installed it I accidentally installed the map as realtime and it ran like ****, so I tried it again and installed it as Flash. When I changed the map it only took a few seconds as opposed to the first time, which took about ten minutes. Is that normal?

Here is what I see what I check my current map:



followed by:



Does that look OK or should "reflash" be on the top of the list? I put 50 miles on the car with the realtime map on, then changed it to reflash and put on another 40 miles.

Am I doing it wrong?
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Last edited by Sublimejoe; 06-26-2011 at 09:35 PM.
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Old 06-27-2011, 08:49 AM   #2
Cobb Tuning
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Hi there.

What does your reflash map show? What are your exact mods? What octane gas are you putting in the car?

Bill
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Old 06-27-2011, 09:27 AM   #3
Aetherfury
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Quote:
Originally Posted by Sublimejoe View Post
I put an accessport on my 06 Outback XT yesterday and it has stalled twice over the weekend. Idle is a little low and if I have the A/C on it comes pretty close to stalling when I stop at a light.

When I first installed it I accidentally installed the map as realtime and it ran like ****, so I tried it again and installed it as Flash. When I changed the map it only took a few seconds as opposed to the first time, which took about ten minutes. Is that normal?

Does that look OK or should "reflash" be on the top of the list? I put 50 miles on the car with the realtime map on, then changed it to reflash and put on another 40 miles.

Am I doing it wrong?
The ten minute part is on the initial install since it is backing up your stock ecu. Just datalog the reflash and if it's running smooth you're doing it right
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Old 06-27-2011, 10:17 AM   #4
Sublimejoe
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Quote:
Originally Posted by Cobb Tuning View Post
Hi there.

What does your reflash map show? What are your exact mods? What octane gas are you putting in the car?

Bill
Stage 1 ATv300

My only mod is the Accessport and I fill up with 93 octane. I just got the car a few weeks ago and I have only filled it with 93, I can't say what the previous owner filled it with.

edit:

Boost seems fine, my only problem is rough idle when stopped (and in drive) and when cruising down the highway its a little hesitant.


Last edited by Sublimejoe; 06-27-2011 at 10:23 AM.
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Old 06-27-2011, 11:19 AM   #5
Lazer84
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So far I've used my AP on my FXT to flash to Stage 1 and then to Stage 2. Both times I have run into a similar experience with low idle, borderline stalling, etc. After driving my car around for a couple of hours the symptoms did not come back at all. I figure it's just the ECU getting adjusted to it's new settings. I also (for my own peace of mind) raised the idle a couple hundred RPMs. Good luck!
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Old 06-27-2011, 11:23 AM   #6
Sublimejoe
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Awesome, I will give that a try. I am also wondering if the problem exists because I did a realtime map first, drove it for 50 miles, then changed it to flash.
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Old 06-27-2011, 02:17 PM   #7
Sublimejoe
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Here is my datalog, it looks like I am getting some serious knock at certain times (Mainly down by line 2000)

https://spreadsheets.google.com/spre...9tZ3c&hl=en_US
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Old 06-27-2011, 09:29 PM   #8
Screwbal
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Something I saw a while ago and follow and it seems to help.... After you flash turn the car off, turn key to on and let it sit not started for 30 seconds, start car and let idle for 5 minutes. Then go start to drive and take it a little easy for a bit and vary RPM and throttle so the ECU has time to re-learn every thing and adjust. Others may say thats over kill for letting it sit for 30 sec then idle for 5 but when I change maps and don't do that it will idle low or stall on me. but even then it goes away over a short bit of time.
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Old 06-27-2011, 09:52 PM   #9
Sublimejoe
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I did let it idle today for about ten minutes after I reflashed with the ACN 91 map. It is better that the first map and seems to be getting better as the miles go by. Still a bit of stutter and knocking but nowhere near as bad as the first map. Here is my datalog of a 15 mile drive:

https://spreadsheets.google.com/spre...1fc0E&hl=en_US
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Old 06-27-2011, 11:17 PM   #10
Screwbal
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One thing I've noticed is my car does best when I flash maps before I've driven. Cold it idles higher off the bat and helps smooth it while it learns. If its hot and I change maps I've come to expect the low low idle and stalling but after a good drive it gets better. I'd say stay on the map for a day and see how it goes. As far as log data that gets hard for me to interpret but other smarter folks may have more to say
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Old 06-27-2011, 11:28 PM   #11
Sublimejoe
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Thanks, I will be taking a 100 mile roundtrip drive tomorrow to pick up some parts so that should be a good test.

I was just going through the boost column on the datalog and it looks like on one row there is a 37.29 psi reading. That has to be some sort of mistake right? Not only does it seem insane, but I feel like I would have felt a difference if boost jumped that high.

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Old 06-28-2011, 02:00 AM   #12
Screwbal
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Hopefully that helps and if so make sure to post back either way though. You're results will help someone else maybe having the same issue and trying to search for a solution and not have to start back at square one. Good luck! Oh and I think your 37.29 has to be a fluke otherwise you would be in orbit
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Old 06-28-2011, 09:12 AM   #13
Cobb Tuning
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The engine control unit (ECU) has learning parameters for idle control and drive-by-wire throttle that, like other learning parameters, are reset every time your reflash a map (including during the AP install), disconnect the battery or reset the ECU (through AP or AccessTUNER software). It is possible that the learning is masking some mechanical issue with the car that only becomes apparent when the learning is cleared.

I would do some driving without reflashing any map and the check your A/F Learning #1 A, B, C, D ranges with the AP (make sure you update to the latest firmware). These are your long-term fuel trims and can usually tell us if there is some kind of fueling issue (bad MAF, bad front o2, post-MAF intake leak).

The knock correction in your logs that you mention is at very low load (<0.80 g/rev) where the knock detection system is generally poor at distinguishing actual knock from other noise. This could very well be false knock (due to something rattling in the engine bay). Sometimes cars with a broken ringland will exhibit this type of behavior (large unexplained knock corrections). Since you bought this car used and with the driveability symptoms you are having after the learning is cleared, I would look into getting a compression/leak-down test done. It is possible to drive around with a broken ringland with only minor driveability symptoms initially. Just something to rule out.

As far as the boost monitor anomaly, sometimes the ECU returns bad data. This isn't a concern unless it happens frequently with the same monitor (indicating possibly a sensor issue if the monitor is based on sensor data).

Bill
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Old 06-28-2011, 01:03 PM   #14
Sublimejoe
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Excellent, thank you for the info. I wasnt sure if you meant to drive it as is, uninstall the AP or reset the ecu and drive. What I did was Reset the ECU through the accessport and changed nothing else. I drove about 50 miles from when I reset the ECU. The car seems to be running OK and was fine accelerating from a stop.

The AP is still detecting a bit of knock but I think you may be right about something rattling in the engine bay. Here is my dataLog from the drive home:

https://spreadsheets.google.com/spre...thkey=CNe-6JAH
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Old 06-29-2011, 08:00 AM   #15
Cobb Tuning
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I would drive it as is for at least a few days to a week, depending on how much you are actually driving the car each day. Do not reflash, reset the ECU, or disconnect the battery during this time. Then take a look at the long-term fuel trims via A/F Learning #1 A,B,C,D. This can help to determine if there are any fueling issues due to a post-MAF leak, for example.

Bill
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