ok, i took my 951 to get smogged a few weeks ago,

bad O2 sensor, and cat had just been re-installed.

rpm- 1544-

%CO2- 13.8
%O2- 0.7

HC-
Max- 133
Meas- 182

CO (%)
Max .82
Meas- .54

NO
Max- 1125
Meas- 1460


Failed, duh.



RPM- 2484

%CO2- 14.1
%O- 0.2

HC

MAX- 108
MEAS- 62

CO (%)

MAX- .62
MEAS- .19

NO

MAX- 955
MEAS- 952


so i barely passed the 25mph, and failed the 15 mph.

so i got my O2 sensor replaced because it was flatlining

and then i failed BOTH tests


RPM- 1545

%CO- 14.0
%O- 0.5


HC

MAX- 133
MEAS- 139

CO(%)

MAX- .82
MEAS- .40

NO

MAX- 1125
MEAS- 1244


Failed


RPM- 2483

%CO2- 14.3
%O2- 0.2

HC

MAX- 108
MEAS- 41

CO (%)

MAX- .62
MEAS- .17

NO

MAX- 955
MEAS- 1091







is it time for a new cat?

i'm getting about 240-250 miles out of the same gas that usually gets me 300 miles + (when i didnt have a cat installed)

 

I had very similar numbers to yours. I replaced my 02 sensor, spark plugs and vacuum lines and passed with fairly respectable numbers after that. Oh, I also used a fuel additive called "Guaranteed to Pass" from AutoZone ($7-8 IIRC).

The donation place I bought the car from did a prelim test and marked "gross polluter" on the windshield...and they said it needed a new cat. Turns out they were wrong. Way wrong.

 

yeah, but even then- i'm getting at *least* 50-60 miles per tank less than i was before.

that's got to be more than new plugs, and a bottle of GTP.

anyone have any good reccomendations for high flow cats?

 

Wow thats sucks. My car failed the first time then I replaced the o2 sensor and everything was perfect. Thats odd how it was worse after you replaced it.

 

Juan,

In March I pulled:

15mph
rpm 2363 / HC 48 / CO 0.37 / NO 413
25 mph
rpm 2404 / HC 62 / CO 0.51 / NO 433

After adding G2P (guaranteed to pass) to an 1/8 of a tank of prem, doing a 20 min 80+ run and leaving the engine running at a test only station, an with APE II chip.

My NA is busting my *****...

 

High NOx numbers are a result of running high cylinder temps...

Also, I called the California BAR during my smog BS and they said "a cat can bouce back" from the brink of death (from running pig rich). Maybe try running a few hundred miles or a few months and try again. Granted that's probably not possible for you...

Have you checked for vacuum leaks? (cracked vacuum lines, torn J boot, etc)

 

no vac leaks, car runs good.


i'm going on a run this weekend, hopefully a few hundred miles of full throttle fun and some seafoam will clean things out?

i tried finding G2P at Autozone, but couldnt.

i can afford to wait a few weeks, but not months.


i ran seafoam through the vac lines, and holy **** did it ever smoke. i almost want to do it again to see if i missed anything......

 

Move to South Dakota and never worry about passing emissions tests ever again.

 

Juan, search the cautions of seafoam hitting your turbo blades!

gp2 is a kragen item.

I'm tired of capitalizing for the same old stuff.

 

Napa carries it also.

 

full throttle = running rich (slightly)

best bet is to cruise on the highway...when the car runs most lean.

I would almost bet money that if you run the G2P, and followed the directions explictely, you'd pass your retest. Though that's easy to say sitting comfortably in my chair

 

i'l try G2P on monday, after i get back.



Kevin- i've run seafoam twice (once w/o cat, once with, the time with, smoked like a cheech and chong car), ran almost better than when i got it afterwards....

 

Did you use the vac line to the bottom of the TB?

 

no, vac line from the BOV.

seems to work well enough....