my 300e mercedes-benz 1992 failthe emission due to adle reading 262 allowed 220 on 1992 Mercedes-Benz 300E

what would cause high idle rpm test

by in Lithonia, GA on October 01, 2012
1 answer 2 comments
ANSWER by on October 02, 2012
i assume that your talking hardra carbons. if so it indicates a slight misfire or poss bad catt. are the other readings good?
COMMENT by on October 02, 2012
The other reading is good hc ppm 97 co51idle rpm 262 allowed 220 co+c02 13.7 how wouldyou know that your catt bad
COMMENT by on October 03, 2012
your co2 is slightly low should be 14.2 which means your mixture is off a little have catt temp ck w/ digital therm. see how hot it is in the frt and then ck the rear of catt. if not sure ck with a muffler shop