My car failed emissions horibly at idle. I have a zc with a pm6 (Stock si ecu). Idle limit of HC is 220 and i had 259 and CO limit is 1.2 and I had 4.86. This is running off stock exhaust with 5zigen knock off muffler. Any ideas would be much apreciated and could save me emissions money.

 

ttt

 

so u have a cat? If u do you might want to replace it. Also a tune up helps, run premium gas, and you can often times find some stuff at auto parts stores that you pour in your gas tank that helps you pass. Damn ur way over in the CO dept.
Hpoe that helps.

 

thanks for the reply....yeah i thought maybe the cat was gutted but i would see why stock piping with gutted cat???? thanks for the reply