Gonzotiki_666

Putting on a new O2 sensor, hopefully that will help. I get nervous flutters in my belly when smog test time rolls around.

SanDiego928

Good luck! May the smog god be with you on that day.

kevinlieb

Make sure the cat's are good and hot for the test. Don't just leave the driveway and pull into the shop: drive it for a bit to get them up to temp.

There is stuff you can pour into the gas to help you pass smog but I have not tried any of them. Anyone else tried them?

hacker-pschorr

Years ago when they first started smoging vehicles, friend of mine was able to get an old Chevy Suburban to pass by stuffing the muffler with sponges.

Thankfully they didn't rev it very high during the test.

Gonzotiki_666

^^^ made me LOL

kevinlieb

I am picturing a flaming sponge coming flying out the tailpipe. That would be great!

Here in CA they actually do a rolling road test, where they put your car on a dyno of sorts and test at 15 and 25 mph.

Randy V

Just make sure you get the engine good and hot and keep the car idling while you wait to pull it into the bay.

Speedtoys

Only certain counties.

SanDiego928

10 miles past my house, no smog required. I may move there one day.

joejoe

Changing oil before test can help also. No rolling test for me either.

Shark_Week

wishing you good luck. i have tried G2P in another vehicle and it worked. don't think i would do it to my GTS.

Adamant1971

If you fail you can try this, worked for me on several old dirty rotary engines. On a quarter tank drop in 1L off methyl alcohol (camping alcohol), drive to your test, pass and then go to the nearest gas station to fill up and dilute. It basically increases your fuel burn temp slightly and decreases your nasty hydrocarbons and co.

http://www.e30tech.com/forum/showthread.php?t=34994

Obviously not good to do all the time, but good in a pinch if you can't pass.

No need to stress.

But + 1 for getting the cats hot.

danglerb

Seems like typical problem with a 928, early ones anyway is NOX more often than hydrocarbons.

safulop

I hear you, bro. I just passed in Fresno, HC passed by 1 ppm below max. Was identical to the test from 2010.

I replaced O2 sensor since then; I think it's my stupid Autothority chips.

Good luck,

Sean

Randy V

So how did it go?