Well for the third time the 89 has failed smog --
15 mph readings;
O2 3.3
HC 7
CO 0.00
NOX 1866 gross polluter level is 1800
25 mph reading;
O2 1.0
HC 2
CO 0.00
NOX 538
Items replaced to date;
plugs, rotor, dist cap, air filter, catalytic converter, egr valve, O2 sensor (bosch), fuel pressure regulator, fuel filter
vacuum lines all checked/routed properly
bottle of chevron "guarantee to pass" stuff run through it
currently has 91 octane fuel in it
temp reading is just over the first line all the time
mileage is 169,000
open cooling system, 3 row radiator --- three months since change over
running too cool maybe?
I've run out of ideas