Hello Folks,
Need your help. My 93 1FZ failed emissions again today with too high NOx levels. Prior to this I’ve replaced the O2 sensors, plugs, wires, cap and rotor. Cleaned the throttle body, replaced the fuel filter, air filter, PCV valve. I’ve been running premium since the last fail a month ago, and put a bottle of CATAClean in the tank this morning on the way to the test station.
I assume the catalytic converter is the next thing to replace, but I’m also wondering if the EGR valve has anything to do with these results. Any help or suggestions would be much appreciated.
Need your help. My 93 1FZ failed emissions again today with too high NOx levels. Prior to this I’ve replaced the O2 sensors, plugs, wires, cap and rotor. Cleaned the throttle body, replaced the fuel filter, air filter, PCV valve. I’ve been running premium since the last fail a month ago, and put a bottle of CATAClean in the tank this morning on the way to the test station.
I assume the catalytic converter is the next thing to replace, but I’m also wondering if the EGR valve has anything to do with these results. Any help or suggestions would be much appreciated.