I've been trying to get my ZXT smoggsble for weeks now, but for whatever reason it just runs so damn dirty. Results at idle: HC 1042 Max 192.
Results at 2500 rpm: HC 238 max 168. This is the third test. First test I got 1459 HC which is insane. Replacing the following seemed to help, but the car is still a GP.
NO: 1PPM CO: 0.54% CO2: 13.5% O2 3.4%
I've replaced all Vacuum hoses, set timing to 22 BTDC, changed the oil, replaced spark plugs with proper NGK type, ran fuel system cleaner, checked resistance at AFM and CHTS and are within proper resistance, cap and rotor are new and plug wires look new too. New TPS, New o2 sensor, and cleaned electrical connections. Car runs pretty well besides a rough idle and hesitation when cold. Any suggestions? Car was also sitting for 6 years prior.
Edited by Connor280ZX, 2 weeks ago.