TRSCobra Posted November 13, 2011 Share Posted November 13, 2011 Actually it's more like surging, but that doesn't parody the LMFAO song as well. My 20GXT EJ257 5MT LGT has been running great since infamous tuned it this summer, but lately it developed a surging. It only happens during part throttle, low RPM cruise and immediatly goes away if I give it more throttle. Went on the dyno today and it was knocking like crazy until it got into boost, then the knock started going away. Only put out 315whp/304wtq. Here's a log while it was surging on the highway on the way back from the dyno. Any help is appreciated. datalog8.csv Link to comment Share on other sites More sharing options...
Infamous1 Posted November 13, 2011 Share Posted November 13, 2011 LOL! Ricky Rozay Can't really tell much by the log. Use AF Learning and Fine Knock learning in ATR while connected to the ECU and email me the screen shots. It will be something similar to Learning View. Link to comment Share on other sites More sharing options...
TRSCobra Posted November 13, 2011 Author Share Posted November 13, 2011 Still tyring to figure that out! Live tracing, cursor tracing, dashboard, what? My brain is filled with useless school crap and it's taking me a while to make sense of this ATR stuff. Link to comment Share on other sites More sharing options...
Infamous1 Posted November 13, 2011 Share Posted November 13, 2011 When you are connected to the ECU via ATR, just click on those tables as you would if you were going to edit them. They will then populate with the ECU's stored data. Link to comment Share on other sites More sharing options...
TRSCobra Posted March 18, 2012 Author Share Posted March 18, 2012 Turned out to be my front o2 sensor. Damn perrin ELH makes it go through sensors once a year! Link to comment Share on other sites More sharing options...
NSFW Posted March 19, 2012 Share Posted March 19, 2012 Consider moving it to the top of the downpipe... If you have a bung there, it's pretty easy to move, and I still get good readings from mine in that position. Of course I also have a stumble from 1700-2000 RPM or so... maybe I should try putting it back. EDIT: Actually, my stumble didn't go away when I forced the ECU to stay in open loop, so I'm certain that the O2 sensor is not a factor in that problem. Link to comment Share on other sites More sharing options...
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