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Old 04-29-2012, 02:00 AM   #1
matty v
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Default 04 WRX Cobb Stage 2 93 Octane HWF V3.10 Map Issue

Hey not sure if anyone has had this issue with the Stage 2 93 Octane V3.10 HWG map, but I installed the map a few days ago and right after I installed the map and turned the car back on after completing each individual task, the car revs dropped to 0 then back up to 1-1.5k about 3 times and then it stalled. I turned the car back on and then it did it again but it did not stall and it idled fine and drove fine until today. Today I started the car up after leaving the store and it did the same thing but did not stall. No codes and it accelerates normal. Both times the motor was somewhat warm if that matters. It has only done it 3 times this past week (twice the day of and once today). I uninstalled that map and re-installed the regular stage 2 93 octane map (that I had before) and it did not idle rough after I turned the car back on. It only does this occasionally right when the car starts with the Stage 2 93 Octane HWG map. I installed the HWG map because I am off by 2 psi and wanted to see if it would help. I think it may be where I am located as my buddy has an STI with the same mods and uses the AP and is off by a few psi also. Maybe a bad map? Let me know your thoughts.
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Old 04-29-2012, 07:30 AM   #2
Black94Snake
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Run the nwg map, and tighten the ARM on your wasregate by two turns.
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Old 04-29-2012, 11:21 AM   #3
Cobb Tuning
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Originally Posted by matty v View Post
Hey not sure if anyone has had this issue with the Stage 2 93 Octane V3.10 HWG map, but I installed the map a few days ago and right after I installed the map and turned the car back on after completing each individual task, the car revs dropped to 0 then back up to 1-1.5k about 3 times and then it stalled. I turned the car back on and then it did it again but it did not stall and it idled fine and drove fine until today. Today I started the car up after leaving the store and it did the same thing but did not stall. No codes and it accelerates normal. Both times the motor was somewhat warm if that matters. It has only done it 3 times this past week (twice the day of and once today). I uninstalled that map and re-installed the regular stage 2 93 octane map (that I had before) and it did not idle rough after I turned the car back on. It only does this occasionally right when the car starts with the Stage 2 93 Octane HWG map. I installed the HWG map because I am off by 2 psi and wanted to see if it would help. I think it may be where I am located as my buddy has an STI with the same mods and uses the AP and is off by a few psi also. Maybe a bad map? Let me know your thoughts.
When you installed the normal stage 2 93 map, did you install as real-time or as a reflash. That is, did you go through the process of connecting the green test mode connector and initialization connector to flash the normal stage 2 93 map? What about the HWG map - was that a reflash or real-time map change?

Bill
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Old 04-29-2012, 11:36 AM   #4
matty v
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When you installed the normal stage 2 93 map, did you install as real-time or as a reflash. That is, did you go through the process of connecting the green test mode connector and initialization connector to flash the normal stage 2 93 map? What about the HWG map - was that a reflash or real-time map change?

Bill
Yes I did the reflash on both maps and I connected and disconnected the white initialization connectors and test connectors.
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Old 04-29-2012, 11:51 AM   #5
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Yes I did the reflash on both maps and I connected and disconnected the white initialization connectors and test connectors.
The changes between the normal wastegate map and the HWG map will not impact idle where wastegate duty will be zero. As such, the changing of the maps is probably just a coincidence especially since the problem is intermittent. Reflashing a map does clear the ECU's learning and if the ECU's idle learning or long-term fuel trims were cleared when you installed the AccessPORT (and each time your reflashed a map), this may have exposed a mechanical issue with the car. Typical problems that can cause idle issues on these cars are 1. intake tract leaks 2. bad MAF 3. bad front o2. You will not necessarily get a check engine light every time for any of these.

Best thing to do is to drive the car around for about a week without reflashing any maps or resetting the ECU. Then take a look at your long-term fuel trims via AccessPORT's live data (A/F Learning #1 A, B, C, D). These are cleared after you reflash a map/reset the ECU, so you have to do some driving (normal cruise-type driving is fine) for a period of time for them to re-populate. If any one of those values is outside of +/- 5% (or especially outside of +/- 8%), then you likely have a fueling issue and the top 3 items I listed above are the best places to start.

Bill
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Old 04-29-2012, 01:14 PM   #6
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Originally Posted by Cobb Tuning View Post
The changes between the normal wastegate map and the HWG map will not impact idle where wastegate duty will be zero. As such, the changing of the maps is probably just a coincidence especially since the problem is intermittent. Reflashing a map does clear the ECU's learning and if the ECU's idle learning or long-term fuel trims were cleared when you installed the AccessPORT (and each time your reflashed a map), this may have exposed a mechanical issue with the car. Typical problems that can cause idle issues on these cars are 1. intake tract leaks 2. bad MAF 3. bad front o2. You will not necessarily get a check engine light every time for any of these.

Best thing to do is to drive the car around for about a week without reflashing any maps or resetting the ECU. Then take a look at your long-term fuel trims via AccessPORT's live data (A/F Learning #1 A, B, C, D). These are cleared after you reflash a map/reset the ECU, so you have to do some driving (normal cruise-type driving is fine) for a period of time for them to re-populate. If any one of those values is outside of +/- 5% (or especially outside of +/- 8%), then you likely have a fueling issue and the top 3 items I listed above are the best places to start.

Bill
Ok thank you. I may also add that my battery was bad 2 weeks ago and I unplugged it and got a new one while on the normal wg map. This would also cause the ECU to re set. I drove with the normal wg map for about a week after the ecu was reset and the problem never occurred. A week later I changed to the HWG map and the problem happened. Switched back to normal wg and it has now been fine.
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Old 04-29-2012, 03:23 PM   #7
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Ok thank you. I may also add that my battery was bad 2 weeks ago and I unplugged it and got a new one while on the normal wg map. This would also cause the ECU to re set. I drove with the normal wg map for about a week after the ecu was reset and the problem never occurred. A week later I changed to the HWG map and the problem happened. Switched back to normal wg and it has now been fine.
The only difference between the NWG and HWG map in this case is the high limit table for wastegate duty. This does not impact idle (i.e. your foot is completely off the accelerator) as wastegate duty will be zero. You can confirm this by viewing wastegate duty via the AccessPORT's live data function. You would have to be above 12% throttle for there to be a difference between the two maps and even then, the difference would be very small. Is your foot completely off the throttle when the problem occurs?

Bill
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Old 04-29-2012, 03:49 PM   #8
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Yea, the car is idling and my foot is off the throttle. It only occurs with that map though. I feel like if it were mechanical it would do it all the time at idle or when the car turns on. This was not the case.
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Old 04-29-2012, 06:55 PM   #9
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Yea, the car is idling and my foot is off the throttle. It only occurs with that map though. I feel like if it were mechanical it would do it all the time at idle or when the car turns on. This was not the case.
Try reflashing the HWG map - download the one from here and use the AccessPORT Manager software to transfer it:
http://www.cobbtuning.com/AccessPORT...tock-SF-Intake

Then get a data log at idle when it occurs:

Bill
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Old 04-29-2012, 09:15 PM   #10
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Why for an 02-03 WRX? Also it happens and then it stops, dont know if I will have enough time to log it while it happens.
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Old 04-29-2012, 09:27 PM   #11
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Why for an 02-03 WRX? Also it happens and then it stops, dont know if I will have enough time to log it while it happens.

because the cobb guys werent really paying attention when they posted that.

You can't use 02-03 maps!
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Old 04-29-2012, 09:39 PM   #12
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because the cobb guys werent really paying attention when they posted that.

You can't use 02-03 maps!
Hahah yea I figured. Thanks for the heads up.
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Old 04-30-2012, 10:22 AM   #13
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Why for an 02-03 WRX? Also it happens and then it stops, dont know if I will have enough time to log it while it happens.
Sorry, my bad - wrong link. Here's the correct one for 04 WRX:
http://www.cobbtuning.com/AccessPORT...tock-SF-Intake

As far as logging, you'll have to anticipate when it might happen and just start logging before then. You might end up with a bunch of logs that don't show it, but, hopefully eventually, you'll catch it. If that proves to be too difficult, then the other option would be to drive around on the NWG map for 2 weeks (without resetting the ECU or reflashing any maps) and make sure that it does not do it at all on that map. We can also check your long-term fuel trims at the end of that period.

Bill
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Old 04-30-2012, 04:31 PM   #14
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Ok, I am at school right now so I only drive it on the weekends. I will keep it on the NWG map for a while and see what happens.
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Old 05-16-2012, 01:16 PM   #15
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Originally Posted by Cobb Tuning View Post
Sorry, my bad - wrong link. Here's the correct one for 04 WRX:
http://www.cobbtuning.com/AccessPORT...tock-SF-Intake

As far as logging, you'll have to anticipate when it might happen and just start logging before then. You might end up with a bunch of logs that don't show it, but, hopefully eventually, you'll catch it. If that proves to be too difficult, then the other option would be to drive around on the NWG map for 2 weeks (without resetting the ECU or reflashing any maps) and make sure that it does not do it at all on that map. We can also check your long-term fuel trims at the end of that period.

Bill
Hey Bill, I have not had any problems with the nwg map.
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Old 05-17-2012, 10:01 AM   #16
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Hey Bill, I have not had any problems with the nwg map.
I'd be curious what "Wastegate Duty" and "Wastegate Max" look like when th e problem is not occurring (with the NWG map) and when it is (with the HWG map). That is the only possible difference between the maps because only the max wastegate duty is changed. But, these should be at 0% at idle regardless.

Bill
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Old 05-17-2012, 05:02 PM   #17
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I'd be curious what "Wastegate Duty" and "Wastegate Max" look like when th e problem is not occurring (with the NWG map) and when it is (with the HWG map). That is the only possible difference between the maps because only the max wastegate duty is changed. But, these should be at 0% at idle regardless.

Bill
I have been driving it pretty much daily for about 2 weeks and it has not occurred.
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Old 05-17-2012, 05:43 PM   #18
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Weird issue.
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Old 05-18-2012, 10:15 AM   #19
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I've directly downloaded the 04 WRX stage 2 NWG and HWG maps from our site and made sure that the HWG version was not corrupted in any way. It is good and the only difference is the high wastegate duty values between the two maps. If you want to give the logging a try that I mentioned on the HWG map, we could go from there. But, I can understand if you don't want to mess with it if the NWG is working fine for you.

Bill
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Old 05-18-2012, 11:28 AM   #20
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Originally Posted by Cobb Tuning View Post
I've directly downloaded the 04 WRX stage 2 NWG and HWG maps from our site and made sure that the HWG version was not corrupted in any way. It is good and the only difference is the high wastegate duty values between the two maps. If you want to give the logging a try that I mentioned on the HWG map, we could go from there. But, I can understand if you don't want to mess with it if the NWG is working fine for you.

Bill
Yes the nwg is running fine, I would rather just leave it as is and eliminate the risk of damaging anything if that is possible.
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