So i tried to pass smog in CALI. I failed at idle with 4-5 times the amount of HC's. All of the other values were fine and in the range. Upon listening to my warm engine idle, i hhave discovered that i have (thought i cured) a seemingly random misfire. It sounded fine brbbrbrbrbbrbrrbrbrbrbrbr*blip*brbrbrbrbrbbrbrbrbrbr*bablip*brbrbrbrbrbrbbrbr
bbrbrbrbbrbrbrbrbrbrb*blip*

Any Ideas and input is greatly appreciated, i am officially stumped. ive replaced everything aside from the motor which has about 20K on it. L98 with 193 heads...

 

Any helpers?? Ideas??
Would be greatly apprecieated even if you are wrong