Emission Test Again

[lincolntran]

flash back: my ls400 is 94K miles, just finished changing timing belt kit, changed catalytic converters, just did a tune up, which the lazy tech. just change 8 spark plug, nothing else.

Then I took it to the emission test again, and it faile again.

I changed the catalytic converters. Most of you guys were right. My cat. converters were bad. I changed those and it fixed the NOx.

the problem i have now is the HC, CO rise real high and the NOx dropped real low.

what is the problem? what should I do to fix this?

thanks

[92Lex]

You only changed the spark plugs and nothing else at all for the tune-up? Can you scan your test results again so I could see them? How does your car run after the timing belt change? Does it idle rough? Has the air filter been replaced?

[lincolntran]

I'll scan the result again when I got home, which will be about thursday night.

thanks alot

[lincolntran]

Here is my last emission test result:

http://www.htatlanta.org/images/lastEmission.gif

thanks

[LexiSexySc400]

Here is my last emission test result:

http://www.htatlanta.org/images/lastEmission.gif

thanks

So how did you fix your problem??