zarosfaltor
04-05-2017, 12:50 AM
Having some trouble passing CA emissions on my 95 525i, when I took it in initially the numbers were failing across the board:
%CO2
%O2
HC(PPM)
CO(%)
NO(PPM)
Test
RPM
MEAS
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
Results
15mph
1706
13.9
0.5
81
23
241
0.47
0.08
0.64
683
194
1356
FAIL
25mph
1867
14.6
0.0
46
14
96
0.44
0.06
0.26
692
166
240
FAIL
Replaced out the O2 sensor, first shop was having trouble with their test machine, so I took it to a different place. The car almost passed, only missed the 25mph HC by 1ppm:
%CO2
%O2
HC(PPM)
CO(%)
NO(PPM)
Test
RPM
MEAS
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
Results
15mph
1658
14.7
0.0
81
23
70
0.47
0.08
0.05
683
194
147
PASS
25mph
2856
14.7
0.0
46
14
47
0.44
0.06
0.15
692
166
155
FAIL
Since I had a free retest at the first place, I had them test it again as well and got similar results (only failing 25mph HC):
%CO2
%O2
HC(PPM)
CO(%)
NO(PPM)
Test
RPM
MEAS
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
Results
15mph
1705
14.9
0.0
81
23
68
0.47
0.08
0.07
683
194
96
PASS
25mph
2871
14.9
0.0
46
14
54
0.44
0.06
0.12
692
166
143
FAIL
Car has had the spark plugs, fuel filter, and air filter all replaced relatively recently. Cooling system was also recently redone. Car idles and runs great before and after replacing out the O2 sensor. Could the cat have just finally started to give up, or does anyone have any ideas to try since it's so close?
%CO2
%O2
HC(PPM)
CO(%)
NO(PPM)
Test
RPM
MEAS
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
Results
15mph
1706
13.9
0.5
81
23
241
0.47
0.08
0.64
683
194
1356
FAIL
25mph
1867
14.6
0.0
46
14
96
0.44
0.06
0.26
692
166
240
FAIL
Replaced out the O2 sensor, first shop was having trouble with their test machine, so I took it to a different place. The car almost passed, only missed the 25mph HC by 1ppm:
%CO2
%O2
HC(PPM)
CO(%)
NO(PPM)
Test
RPM
MEAS
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
Results
15mph
1658
14.7
0.0
81
23
70
0.47
0.08
0.05
683
194
147
PASS
25mph
2856
14.7
0.0
46
14
47
0.44
0.06
0.15
692
166
155
FAIL
Since I had a free retest at the first place, I had them test it again as well and got similar results (only failing 25mph HC):
%CO2
%O2
HC(PPM)
CO(%)
NO(PPM)
Test
RPM
MEAS
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
MAX
AVE
MEAS
Results
15mph
1705
14.9
0.0
81
23
68
0.47
0.08
0.07
683
194
96
PASS
25mph
2871
14.9
0.0
46
14
54
0.44
0.06
0.12
692
166
143
FAIL
Car has had the spark plugs, fuel filter, and air filter all replaced relatively recently. Cooling system was also recently redone. Car idles and runs great before and after replacing out the O2 sensor. Could the cat have just finally started to give up, or does anyone have any ideas to try since it's so close?