05sleeper Posted March 22, 2013 Share Posted March 22, 2013 So yesterday I got tuned by Cobb and was running 14.7 @ idle and cruising and 11.1 at wot @ 19psi and felt great! Next day it's showing 13.7 @ idle and cruising and under 11 at wot now only 17.5psi... That started happening before tune when I deleted the rear o2 sensor to put my wideband in but I got it tuned without the rear o2 sensor in.. Do you think putting my rear o2 sensor back in would help this issue BC it pulls strong but not as strong as it did. I can't get my LC-1 to connect to my ATR software to datalog so anyone know another program I can use to datalog that would support the LC-1 BC I've tried different cables and reading instructions from Cobb and no luck. Thanks. Link to comment Share on other sites More sharing options...
bnguyenbb6 Posted March 22, 2013 Share Posted March 22, 2013 Boot leak? what does your stft say? Or have you tried recalibrating the lc1? Link to comment Share on other sites More sharing options...
iNVAR Posted March 22, 2013 Share Posted March 22, 2013 http://legacygt.com/forums/showthread.php/rear-o2-sensor-important-86456p2.html Read the postings specifically by merchgod. Of note: It is well known that removing the rear o2 completely (or leaving it connected but pulled from the exhaust) results in a rich condition in closed loop with the 32-bit ECU. Link to comment Share on other sites More sharing options...
05sleeper Posted March 22, 2013 Author Share Posted March 22, 2013 Shouldn't have a boost leak and haven't checked the LC-1 yet just going off of the AP till I get the laptop hooked up to read the wideband. Invar, That makes since now thanks. do you think putting the o2 sensor back in will hurt anything since I got it tuned without it? I'm guessing it would help to put it back in and just get a bung welded in for the wideband. Link to comment Share on other sites More sharing options...
iNVAR Posted March 22, 2013 Share Posted March 22, 2013 Probably won't hurt to put it back in unless they did something specifically to account for it. Ask them just in case. Link to comment Share on other sites More sharing options...
05sleeper Posted March 22, 2013 Author Share Posted March 22, 2013 Ok I'll email them, i know they had to delete the code for it to not throw the cel but I'll double check if they changed anything else for it. Link to comment Share on other sites More sharing options...
05sleeper Posted March 22, 2013 Author Share Posted March 22, 2013 Got email from tuner and he said he's seen tunes go rich with no rear o2 sensor so he sent me another map disabling the af correction for the rear o2 sensor. So I'll flash that and see how it does from there. Link to comment Share on other sites More sharing options...
adosdrummer Posted March 23, 2013 Share Posted March 23, 2013 I have a catless 3in downpipe with the stock rear 02 sensor in with no non-fouler. I just disabled the code. Is there AF correction with the rear o2? I can not find that in romraider. Link to comment Share on other sites More sharing options...
05sleeper Posted March 24, 2013 Author Share Posted March 24, 2013 It still didn't fix my issue, still running too rich but yes it's the af correction #3 that uses the rear o2 sensor, or so that's what i was told from the Cobb tuner. Link to comment Share on other sites More sharing options...
iNVAR Posted March 24, 2013 Share Posted March 24, 2013 Try putting the O2 sensor back in. As adosdrummer mentioned, I couldn't find a setting to disable rear O2 correction in the ECU editor either. Just a checkbox to disable the CEL, which doesn't help. So I have no idea what your tuner changed for you...? Link to comment Share on other sites More sharing options...
05sleeper Posted March 24, 2013 Author Share Posted March 24, 2013 Ya I'll be putting the o2 sensor back in either today or tomorrow and reflash to the first map and see if that fixes it. Finally hit 19 psi last night but it was pretty chilly out so that's probably only why haha and mine was a tune on the AP so I'm guessing the software he had was able to disable the af correction for me Link to comment Share on other sites More sharing options...
iNVAR Posted March 24, 2013 Share Posted March 24, 2013 Yeah, AP is different so it might have some settings on it that ROMRaider's table definitions haven't discovered yet. Link to comment Share on other sites More sharing options...
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