Failed Emission Test Nox At 15 Mph

[richy z]

I was just curious, would running 89 gasoline instead of 91 cause me to fail only the NO portion at 15 mph max 748 meas 919. Thank you, any input would be great.

[92Lex]

Can you scan and post the results of the test? I'm a certified auto/smog tech.

[richy z]

I cant scan but I can give you the info

HC (PPM)

15 MPH Max 102 Meas 6

25 MPH Max 77 Meas 4

CO(%)

15 MPH Max .68 Meas .00

25 MPH Max .55 Meas .00

NO (PPM)

15 MPH Max 748 Meas 919 FAILED

25 MPH Max 687 Meas 685 ALMOST FAILED

Thanks

[92Lex]

What were the CO2 and O2 readings?

Off topic, but which part of San Jo are you from? I used to live off of Capitol and McLauhghlin.

[richy z]

I used to live over by jackson and mckee, now i live over by the pink poodle.

CO2 (%) O2 (%)

14.90 .12 @ 15 MPH

14.90 .05 @ 25 MPH

[92Lex]

The car seems to be running a little on the lean side because of the low CO measurements. You probably should check the EGR system first, to make sure that it's working correctly. Go buy a cheap hand vacuum pump from an auto parts store and use it to test the EGR valve/modulator.

Pumping 91 octane gas will reduce the NOx emissions, slightly.