1991 Accord, A/T
I failed my smog and only have a few days to fix it before my temp tags expires! I am in CA so the smog is tough here.
My NoX emissions were high:
15mph – Max 799 – Actual 1206
25mph – Max 738 – Actual 1211
I was also told my timing was off – High RPM. However I checked my timing which looks right on target as well as the RPM at idle sitting right at 800.
So now I need help to pass Smog ASAP. The Cat is working fine and it has a new O2 sensor. The EGR was replaced with a used one which fixed the CEL code 12 it had before.
The car was warmed up with a 20mile drive, I have cleaned the engine with seafoam, new radiator and fresh coolant.
Any idea how to lower that last few hundred PPM?