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DaSkinnyGuy · 08-01-2010, 10:03 PM

*When was the last time you change your spark plugs?

*Last time you ran fuel system treatment through your tank?

*Has the timing been change on your car since factory? If so advance the timing this should help the HC count.

*Oxygen sensors running good? maybe causing the car to run rich.

* does your car get to normal operating temp? if not you may have a lower temp rating thermostat causing the car to stay in open lope longer causing the car to run to rich.

*Overall HC is to much fuel or misfire causing unburnt fuel.

*Also give the car a few hard Wide open throttle runs while driving clean the car out doesnt hurt.

*also possible your cats are bad. thunderbolt racing has cats for $40 each will get you to pass.

*air filter is clean?

* any vacuum leaks? this also can cause high HC

* head gasket leak?

08-01-2010, 10:03 PM	#2
DaSkinnyGuy Join Date: Jul 2006 Location: unknown Posts: 2,776 iTrader: (0)	When was the last time you change your spark plugs? Last time you ran fuel system treatment through your tank? Has the timing been change on your car since factory? If so advance the timing this should help the HC count. Oxygen sensors running good? maybe causing the car to run rich. * does your car get to normal operating temp? if not you may have a lower temp rating thermostat causing the car to stay in open lope longer causing the car to run to rich. Overall HC is to much fuel or misfire causing unburnt fuel. Also give the car a few hard Wide open throttle runs while driving clean the car out doesnt hurt. also possible your cats are bad. thunderbolt racing has cats for $40 each will get you to pass. air filter is clean? * any vacuum leaks? this also can cause high HC * head gasket leak? __________________ 2000 Pewter Trans am, M6, SLP Lid,LS6 intake,Kooks 1 7/8" Long tube header,Classic Chambered Powersticks, hurst,off road X-pipe, Strano springs & Koni's, Monster level 2 clutch, HPtuners wide band tuned and a homemade ram air box sealed off. Last edited by DaSkinnyGuy; 08-01-2010 at 10:09 PM.