MY CAR FAILED SMOG DUE TO INGNITION TIMING HC AT 15MPH READ 112 AT 25 MPH READ 80 NO AT 15MPH READ 805 AT 25MPH READ 560 PLEASE HELP, THANKS, CHRISTINA
SOURCE: high hc
you may need replace the catalytic converter, but 1st do this, clean the throttle body and idle airbypass valve, change the oil before the retest as well, get it as hot as you can before the test, hold it at a high idle prior to the test, this may squeak you by, as a 20 year smog tech these are the thing I did, if all else fails do the cat conv.
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