I hope Duke (Duke2.6) reads and responds soon. I failed emissions for high HC.




Idle 732 rpm CO2%=8.60;O2%=0.00;HC (PPM)MAX=120.00;AVG=29.00; MEAS=187.00;CO2 (%)MAX=1.00;AVG=0.10;MEAS=0.05
2500 2378rpm CO2%=14.60;O2%=0.10;HC (PPM)MAX=140.00;AVG= 20.00;MEAS=201.00;CO2 (%)MAX=1.00;AVG=0.10;MEAS=0.24





I was tested as a "High Emitter Profile". All other systems passed. The test computer program automatically directed a "conditioning run" at 2500 rpm for three minutes. Then it re-ran the idle and 2500 rpm tested. Final result = FAIL. The tester thought I had a slight miss at 2500 rpm test. I can't see or feel it. The car runs great.

I went back to my indy garage. They put a new set of plugs in and "leaned out" the fuel distribution valve. I have relatively new rotors (one year old). The caps are original as are the plug wires. We aborted the second emissions test just prior to a second "conditioning" run. The tester said when the computer tells you to do a conditioning run, you are almost garranteed a failure. I did not want to end up a "Gross Poluter" with the DMV.

I know you have gone through this with other owners, but I am hoping for some words of advise as to areas to look at.

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'92 MB 500 SL
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