|
I have a 1994 740il with 208k miles that just failed CA smog. Passed all tests except HC (PPM) at 15 MPH. My reading was a 72 and Max allowed is 56. I am thinking new plugs, oil change and getting engine nice and warm prior to test will help...any ideas? (
My Test Numbers
15MPH %CO2 - 15.2, %O2 - 0.0, HC (PPM) - 72 (MAX 56), CO% -.12, NO (PPM) - 117
25MPH %CO2 - 15.1, %O2 - 0.0, HC (PPM) - 25 (MAX 45), [/B]CO% -.08, NO (PPM) - 45
|