Greetings all.
I recently purchased this vehicle and have been having some issues with passing a smog test. My smog test guy has been helping me out by giving me a pre-check to get things sorted out prior to the official check. The big issue, at first, was high HC. The first checking I did had the HC come in at 1300 at idle. I changed the O2 sensor, air filter, gave it an oil change and replaced the fuel pump (the one on the car was not correct). Doing all this brought the HC down to 300. A lot better but still too high. The catalytic converter in the car was suspect so I had a new Magnaflow unit installed. HC problem solved! However, this is what happened...
Everything looked great but the 25mph NO went through the roof! How could the NO go from 1 at 15mph to 2704 at 25mph? I don't get it.
Has anyone dealt with this before? AFM perhaps?
CA Smog Test Fail High NO
Moderators: GRNSHRK, ron, bfons
CA Smog Test Fail High NO
Russell
1989 E30 325ic
1986 E24 635CSi
1989 E30 325ic
1986 E24 635CSi