OK, here goes again:

2 years ago:

RPM: 647
CO2% Measured: 15
O2%: .1
HC, Max: 100, AVE: 17, Meas: 12
CO% Max:1.00, AVE: 0.00, Meas: 0.00. PASS

RPM: 2556
CO2% Measured: 15
O2%: .2
HC, Max 130, AVE: 12, Meas: 13
CO% Max:1.00, AVE 0.10, Meas 0.02 PASS

Last week:

RPM: 1464, 15 mph.
CO2% Measured: 14.4
O2%: .07
HC, Max 81, AVE: 21, Meas: 46
CO% Max: 47, AVE 0.05, Meas 0.09
NO: Max 685, AVE:150, Meas: 283 PASS

RPM: 1258, 25mph.
CO2% Measured: 14.3
O2%: .1
HC, Max 47, AVE: 12, Meas: 64 FAIL
CO% Max: .44, AVE 0.05, Meas 0.14
NO: MAX 696, AVE: 136, MEAS: 270

From your write up before, it looks like my cat was warmer 2 years ago that it was last week.

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1994 E420, Pearl Black/Black. 2.82 rear diff., AMG front spoiler, painted lower half. SOLD

1972 & 1974 BMW 2002tii's.