Failed OBD1 emissions - emission gurus

[SLow_POke]

HC'S ARE UNBURNED FUEL SO IF IT LEAN THEN THEY WOULD BE LOW(LIKE UR READINGS). I HAVENT WRKD IN A SHOP IN A WHILE SO IM A LIL RUSTY BUT I HAVENT FORGOTTEN ALL MY DRIVEABILITY SKILLS. I CAN TELL U HOW TO TEST UR CATS IF U HAVE ACCESS TO A LASER TEMP GUN OR SOME KINDA WAY TO TELL THE TEMP GOING IN AND OUT OF THE CATS.

BTEC!!! Im a lil rusty myslef but you got it pretty well man.

also a clogged cat while give you HIGH Nx.
LIke BTEC said if you have a heat temp gun you while more then deff rule out/in the cat IF* its bad .

I also seen Dirty MAF give you high nox


-Ernie

*EDITED*
and i jsut saw you co's seems reslly low LEAN MISFIRE>? vac leak possible