airborne

Are there any simple and easily undoable adjustments you can make to pass emissions? would killing boost help? i passed just barely with my setup (just hiflo cat) and if i can't do that again i was hoping there was something simple that could be done. also, they don't really need to rev the engine much for an inspection so i was going to lower the rev limiter to make sure they don't screw around...hows 4k sound?
thanks for input...

mmaragos

What were your numbers like?

My HC (ppm) was 65 (standard is 220), CO (%) was 0.07 (standard is 1.20) and CO2 (%) was 15.6% (no standard). This was at 928 RPM. My idle is set to about 720, they must have rev'd up to over 900 RPM (maybe standard procedure in NC?).

I used the lower boost map (base map) when I went in for the test. Plugs and O2 sensor had less than 1000 miles, cat had less than 4000 miles, oil had less than 200 miles, 93 octane. I ran the car hard (a couple WOT runs) just before I took it to have it tested.

I have only tested once, so I don't have a lot of experience, but your car could have had a "poor" test day...not really poor (since you passed). I have heard that HC can vary significantly from test to test. I guess that I will have more data when I test again.

cewrx7r1

iTrader: (2)

Adjust boost to lowest level or plug WG actuator solenoid control line.

Make sure the O2 and ignition idle control functions are turned on.

Reduce idle speed.

Could remove a little fuel on the PIM rpm or voltage maps.

Go there with about 10% ethanol in the gas.

airborne

i believe it was the hydrocarbons that were close...don't have the numbers handy
thanks for the tips!

fluxen

I have what seems to me just a common-sense hypothosis about this: The bigger the exhaust, the better you'll test. What do people think? It seems to me that if you've got 3" tubing, your ppm and % measurements will logically be lower since there is greater volume within the exhaust. I guess it would depend on how the sniffer works, which I really don't know. If it has a pretty serious amount of vacuum, and sucks in enough air to "empty" the exhaust, it wouldn't matter, but as far as I know they don't have that kind of vacuum. Anyone know if this is true?

SanJoRX7

Anyone ever think about just injecting ambient air to the exhaust in an attempt to put non-exhaust air to the sniffer? I mean, it's probably not difficult to do...rig up some kind of pipe/hose to inject outside air into the exhaust post cat, and the sniffer will get less of the bad stuff and more of whatevers in the air. Assuming that the air isn't toxic or whatever, then this could work, no?

Also, I had thought about putting two cats on to help pass smog...anyone ever do this? Any reason why it wouldn't help with the sniff test? Might make the car run like hell, but if you pass smog, what the hell, just take one or both off after the test.

atihun

I think its called a STOCK AIRPUMP?!?! It is actually better to inject the air INTO the cat, hence catalytic converter. It catalyzes reactions between chemicals, and if there is oxygen available, you will catalyze the reactions to form more CO2 and NO2 (ok at low levels) instead of CO and NO (bad at high levels).

KZ1

drive your friends car to the testing lab, right 7s VIN number, year, etc on piece of paper then wrap it in 100$. That shoudl do that trick.

SanJoRX7

Anyone know what the legal implications of offering a test center a bribe are? I guess it's probably been done, but are they any more or less obligated to report you to the DMV? Also, for those that "have a friend" that has done the bribe thing, any idea how often it works out vs. not?

Also, regarding the stock airpump thing above...the whole reason I mentioned it in the first place is that if the stock airpump did a good enough job at faking out the sniffer, we wouldn't have any trouble passing emissions now, would we

KZ1

Georgia I am sure is different than cali. But I bet it would be easier out there becauys emissions ar so strict. just post message in lounge or something. A 16y.o kid is not going to take you to authorities inwhich case just your word against his. What does your friend who wants to do this have to loose, just try it, what the hell. Worked for my friend.

Tunning and rigging your car to pass emission only temporarily is the same as bribing, both deception. However, bribing is a hell of a lot easier. especially if you haev midpipe like me.

Toadman

That's the problem in **** California tho... the emissions tests are sent via modem immediately upon completion of the test without the smog tester's permission to prevent bribery. You can pass visual most likely, but the stats are transmitted. If you are unsure of passability, do a "test-only" for 20 bucks first, which is not transmitted. Otherwise if you fail, you will be referred to a state-sponsored referee smog station for compliance. It would be a good idea to disconnect and stash the remote commander, of course.