I did not pass smog due to a high HC at idle ( 177 at 650 rpm) no check engine light or codes posted I've changed both o2 sensors on bank 1 new denso spark plugs new air filter oil change cleaned the air box checked for leaks on all vacuum lines and hoses and still high HC any ideas everything else is fine the HC is normal when at 2500 rpm my visuals and equipment always pass. Can this be due to the customer support program with misfired for my 06 gs300 that is notorious plz help

 

http://www.smogtips.com/failed-high-hydrocarbons-HC.cfm

I've never really read into high HC, your next goal might be to check your injectors to see if it's running in tip top shape.

Ultimately, you may also need to run a compression check too, to make sure all 6 cylinders are within spec.

GL!

 

cool thanks I will look into that see it that might be a problem but looks like its dealership time

 

Yeah, I really wish you the best of luck. Kinda wish I had more experience with these smog tests. FL doesn't have'em