LegacyDan Posted March 19, 2014 Share Posted March 19, 2014 My car failed local emissions test, Below is the info on the report Oil temp: 82c Low idle(760rpm) CO 0.02 vol% HC 13 ppm High idle(2850 rpm) Lambda 1.02 CO 0.51 vol% and it needed to be below .2% HC 47 ppm I asked my tuner if he thought the tune might be a bit rich, he asked to check and make sure its running in closed loop mode on low load and idle. When i checked with romraider the only parameter is saw was cl/ol fueling and that ranged from 7 to 10 while revving to about 3000rpm What parameters should i log go see if im running rich? Link to comment Share on other sites More sharing options...
ras06LGT Posted March 19, 2014 Share Posted March 19, 2014 Air/fuel ratio Link to comment Share on other sites More sharing options...
discojon Posted March 19, 2014 Share Posted March 19, 2014 http://www.romraider.com/forum/topic1603.html CL/OL Fueling* (1,1) -> This will indicate the current fuel system status (Closed Loop / Open Loop): [08 = Closed Loop (normal)] [10 = Open Loop (normal)] [14 = Open Loop due to system failure] [07 = Open Loop due insufficient coolant temp or front O2 not ready] Link to comment Share on other sites More sharing options...
LegacyDan Posted March 19, 2014 Author Share Posted March 19, 2014 Air/fuel ratio What should the AFR be at idle I'm seeing about 14.7 I think Link to comment Share on other sites More sharing options...
BrandonspecB Posted March 19, 2014 Share Posted March 19, 2014 14.7 is where it should be at. Link to comment Share on other sites More sharing options...
ras06LGT Posted March 19, 2014 Share Posted March 19, 2014 14.7 - If you are seeing anything lower than that, you are either not in closed loop or have a mechanical problem. Link to comment Share on other sites More sharing options...
LegacyDan Posted March 19, 2014 Author Share Posted March 19, 2014 So if I'm at 14.7 at idle I'm in closed loop so tune is not my issue? Maybe my sports car cell is done? Link to comment Share on other sites More sharing options...
ras06LGT Posted March 20, 2014 Share Posted March 20, 2014 14.7 is what the ECU is targeting for closed loop AFR at idle. If you are seeing 14.7, you are not running rich. I'm not sure if the car can run at stoich mixture in open loop, but if you also log the CL/OL fueling as described above that will tell you. BTW, lambda (from your emission report) is the ratio of AFR to stoich (14.7). Since you are 1.02, you are very close to 14.7 AFR at the high idle. How modified is your car? Do you have catted or catless DP? Link to comment Share on other sites More sharing options...
LegacyDan Posted March 22, 2014 Author Share Posted March 22, 2014 I have 3" catless DP with sports cat cell in lower center section, it passed 2 years ago, maybe cell is done and needs to be replaced. I'll price up a replacement for this, might be the cheapest route! Link to comment Share on other sites More sharing options...
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