Author Topic: Failed Smog (Read 3150 times)

ant08 · « **on:** September 14, 2009, 06:45:11 PM »

Hey Guys,

I passed everything except the NO (PPM) at 15mph, measured number was 1018 and max is 815. I didn't really get to warm up the car before getting the test done. Do you think I should do some spirited driving and retry? Any suggestions is much appreciated.

Thanks in advance!

roundel318 · « **Reply #1 on:** September 15, 2009, 04:31:59 PM »

Yes, get out on the freeway for 20 miles ish.
Get it nice and warmed up and retest!

PumpItUp · « **Reply #2 on:** October 07, 2009, 03:28:47 AM »

Basic stuff to remember on any car going in for smog:

-Do an oil change. Check spark plugs.

-Get new gas!

-And go drive around on the freeway in 3rd or 4th gear for a while to get the cat warmed up. It can cool down pretty quick so have them run the test right after you get there.

roundel318 · « **Reply #3 on:** October 07, 2009, 03:30:12 PM »

Warm up, get on the freeway for a good 5-10 miles, get the revs up 3k+ steady for a bit.
Should be better then

ant08 · « **Reply #4 on:** October 07, 2009, 06:44:55 PM »

Thank for the advice. Unfortunately, even after an oil change, air filter, and warmed her up really good, I still failed the NO 15mph test. I had to get a new cat.

Bmw02er · « **Reply #5 on:** October 08, 2009, 11:42:12 AM »

Open your AFM and tweek it. I had the same problem. Probably running too rich because of defective AFM.