lincolntran Posted November 10, 2004 Share Posted November 10, 2004 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 Quote Link to comment Share on other sites More sharing options...
92Lex Posted November 11, 2004 Share Posted November 11, 2004 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? Quote Link to comment Share on other sites More sharing options...
lincolntran Posted November 11, 2004 Author Share Posted November 11, 2004 I'll scan the result again when I got home, which will be about thursday night. thanks alot Quote Link to comment Share on other sites More sharing options...
lincolntran Posted November 12, 2004 Author Share Posted November 12, 2004 Here is my last emission test result: http://www.htatlanta.org/images/lastEmission.gif thanks Quote Link to comment Share on other sites More sharing options...
LexiSexySc400 Posted June 7, 2008 Share Posted June 7, 2008 Here is my last emission test result:http://www.htatlanta.org/images/lastEmission.gif thanks So how did you fix your problem?? Quote Link to comment Share on other sites More sharing options...
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