hello,

i bought the car in may, 2009. i tried twice and failed twice on my emissions here in houston area, last week & this week.

before the 2nd test, i changed
1) oil, oil & air filter
2) replaced flame trap
3) checked and replace most vac hoses
4) cleaned tb & iac
5) checked for vac leak from manifold & injectors by squirting fluid around them.
6) blocked off vac hose to car interior
7) checked & metered air temp sensor, map ssensor
8) pulled off o2 sensor to check engine idle when plugged back in.
9) checked for exhaust leaks up to cat & at o2 sensor.


my first readings:
high standard/actual low standard/actual

hc (ppm) 120/19 pass 124/82 pass
co(%) 0.67/0.10 pass 0.69/.29 pass
co2(%) na/14.3 na/14.1
nox(ppm) 848/1520 fail 937/1984 fail
dilution >6.0 /14.4 pass >6.0/14.39 pass


2nd test
hc (ppm) 120/19 pass 124/25 pass
co(%) 0.67/0.10 pass 0.69/.13 pass
co2(%) na/13.9 na/14.0
nox(ppm) 848/1554 fail 937/1533 fail
dilution >6.0 /14.0 pass >6.0/14.13 pass

bottom line, after 2nd try,
1) my nox went up on high speed, but down on low speed,
2) nox now about the same for high & low speed.
3) both are a little less than double the limit.

the previous owner had been using the k&n air filter. when i pulled the tb off, it was tons of oil junk on there. but i figured what little oil there is, it's burned off.

i just bought a new cat. i didn't see how i could measure the o2 sensor, since it has that special clip and the pins are sealed in the connector--can't reach the pins to measure with my volt meter.

i'm