Vehicle: 2001 Cadillac Deville
Promblem: Failed Smog Emissions Test [HC (PPM) MAX=31 MEAS=50]
Recent Services: New Spark Plugs, Air Filter, Oil Change, Throttle Body Cleaning, Inspection of Idle Controllers.
Does anyone have any ideas what could be causing my car to fail? I've been having ENHANCED SMOG INSPECTIONS, would it pass if I have a standard smog?