does anyone have a picture of the stock cas timing position for the rb20det silvertop? Also what would cause it to run rich? I ran the diagnostics test and the single led light stayed on. Everything else checked out fine (55). Only mods are blitz intake, high flow exhaust/cat and i have alot of black carbon buildup on the tail pipe and the exhaust really smells. i get a headache just from the smell of it, please help thanks