After the car gets warmed up i get a good stream of smoke out of the tailpipes .... Now its not bad smoke like black or nothing .... just more than there should be. now it does hav flowmasters on it but i recently took it through inspection and it failed the HC at 331 on a 220 limit due to unburned fuel .... so i put new plugs in it ....the old ones were burnt up and 5 degrees undergapped and an accel cap and rotor and a new ign coil .... So could it be because its burning that fuel now ? and do u think that will be enough to get it down to 220 on the HC