signifigantly reducing NOx

[Peterdroy66]

We'll lets just say that if the octane plug just happens to NOT be making a connection, this can have a signifigant effect on NOx emissions.
Passed NOx 129.
enough said

[JT93SC]

Yea - The guy that did my emmission test the last 2 times did exactly that same trick. 1st he tests it and I get a high NOx reading. Then buddy, (for a small fee of course) disconnects the sensor and it magically passes. I have to remember to disconnect it next year before I take it in.

[JustinH]

sounds like your emission laws are boarderlining on ridiculousness.

[Peterdroy66]

No fees involved, but you have to understand what and why...
NOx can be reduced by less advance in ignition timing - but HC's go up. I had plenty of room to spare in HC's.
The octane plug is provided so that you can run 87 octane regular gas without pinging, it pulls the timing back 3 degrees. This just happens to also reduce NOx.

Not really twisted, just a matter of understanding how it all works.

[Katoom]

Anyone mind sharing where the octane plug is???? Mine is due for E-testing this October. Thats why I just put in two new O2 sensors.