Ok so I recently purchased a 99 mustang v6 auto for my daughter for what I thought was a good price til I tried to smog it. I live in CA and shop said I have very high levels of hydrocarbons (gas I believe) said to pass have to b under 51 @25mph considered gross polluter @270 and mine is blowing over 1100!! The car is definitely not running right tech told me to start by cleaning MAF and replacing o2 sensors along with tune up... b4 I start throwing money at this thing I wanted to get some input from others ( not impressed with shop as the tech argued with me for several minutes cuz he swears there is no way my car has four cats, which of course it does) N e way does this seem like the right path or is there another possibility... I'd hate to put in new plugs wires ect just to have it all foul out... n e feedback or suggestions r appreciated