Hey i really need to know what i can fix so that i can pass the next emission test. I went today and i failed the idle part of the test. The HC ppm read 348 and the limit is 200.
The guy that did it for me said it might be miss firing. On the screen it looked as if the idle was jumping.
So bascily high HC at idel.. how can i fix this?

Burgundy '91 TSi- 3" turbo back,big 16g,adjKYBs,FMIC,RC 550's, 255Lph, Rebuilt engine,ect