Rough idle while wait for green light.

[KenC]

Wait... what normally does a well Eta idle at?

Mine idles somtimes 500 rpm and sometimes a bit lower like 470ish

Your idle is at 470!? Are you sure? I was under the impression that a manual couldn't even idle that low and keep running. It should be up around 800 or so... I've got mine at 1k.

[dpg23]

OK.. How do I make the rpm go lower to 220 rpm instead 586 rpm (Smog required 220 rpm standard)

Your engine WILL NOT idle at 220 rpm. lol

These guys are right, something is measuring 586 ppm and the max allowable is 220 ppm. HOWEVER, without telling us WHICH GAS IS FAILING, then there is no way to help you. Is it failing for NOx? Hydrocarbons? CO?

If it's failing for NOx, I'd look for low fuel pressure, plugged fuel filter, clogged fuel injectors, severe overheating, advanced timing, vacuum leaks, and anything that causes the engine to get extremely hot. HC's: Leaking fuel injector, leaking fuel pressure regulator, vacuum leaks, excessive rich or lean, low compression, misfiring, bad O2 sensor. CO: high fuel pressure, excessive rich or lean, dirty air filter, bad O2 sensor.

[Vass325es]

Ahh, Now I understand about PPM. Ok.. Where is Catalytic converters. I have look and couldnt find it..