Hey guys, Hopefully you can help me out with this. I have an 86 blazer with a 350 and a computer controlled carb ( california ) . I have a horrible rich problem that i cannot figure out , nor can I find much information about tuning the carb. As far as I can tell the carb should be stock inside, and I have tried the adjustments that I can find online but what I am still getting is a check engine light and a choke light that stay on constantly. If I rev the engine with quick throttle movement I get puffs of black smoke out the exhaust, and on warmup the truck pops and misfires as well. Any suggestions or links to info on how to resolve this would be awesome, I have searched and cant seem to find what I need. I also have no idea what codes I have or the "poor mans" way to check what the current codes are, and where I can find what code means what. thanks for any help ~!