Just ran a pre-test on my 86 4runner 22re:
15mph/25mph -
RPM = 1544/2351
%CO2 = 13.3/13.6
%02 = 0.00/0.00
HC (PPM) = 163/151
CO% = 3.67/3.40
NO (PPM) = 29/17
Timing = 10 BTDC
Failed on the functional Fuel Cap.
Prior to this test, I did valves, new 02 sensor, new exhaust manifold, gaskets...