Barely failed a smog test i need help

[Fonzs13]

So its that time of the year were i had to go smog my s13, the car passed the 15 mph test but failed at the 25 mph....on the bottom are the results for the 25mph test

%CO2
Meas-14.2
%O2
Meas-0.6

HC
Max-65
Meas-71

CO
Max-0.44
Meas-0.04

NO
Max-516
Meas-519

Should i just buy a new cat since it hasnt been replace in forever the stock OEM one is still there Lol...any help would be greatly appreciated thanks guys :faint:

[S-Nation S13]

Yes with those numbers cat will fix your problems..

[Gar9854]

Retard the timing and ask the inspector to do the 25/25 in second

[Fonzs13]

I have the timing set to 22 degrees, and how much should i retard it?

[bad dog]

when i rodding cars i would put-- 1/4 tank shell gas --4 bottles 90% isopropyl alcohol in gas tank , get it at any drug store.

no problem passing .