ok guys, Well let me start out by saying hello, My name is Sonny and i have an 88 K5 blazer. I boutgh it for 1800.00 from some moron and now i have to fix EVERYTHING!! lol... well I got it home after a VERY long, smoky & stinky(fuel and burning oil) 4.5 hour drive. Now im trying to ultimatly make it a very great truck, but right now i just need it to run good enough to pass California Smog. It was running WAYYY TOOOO rich, so bad that your clothes would smell after driving it, and the check engine light was on, Also it leaks oil pretty bad and blows on the pipes thats where the oil smell comes from. Well the first time the check engine light came on I checked the codes and it was an O2 code. So once i found an O2 that fit the headers that are on there i needed to locate the O2 wire, (because it was "somewhere up there" acording to the guy i bought it from). Well once that was done it still ran like crap i tried to check the timing and was unable to because the guy had put some dumb ass crome cover that doesnt have timing marks on it so... I did my best. I know I have the timing retarded (to burn less fuel) and now the check enging light is shows a code 45 for too rich and a code __ for knock sensor. Now if im corect, The knock sensor is on the passenger side of the motor and if it is then its not connected. And from what i have gathered, if the Sensor is not connected, then the ECU will retard the timing up something like 18 degres, now it thats the case why the hell is it still sooooo rich? Now after puting that O2 in place it did help ALOT! but now anytime we give it more throtle than normal there goes the light. I found a wire near the knock sensor that i though maybe went to it but it was cut so i extended it and connected it but no luck. What do you guys think my next move should be? I took it to a guy that was supposed to be "the blazer king" and his buddy looked at it and said that it was time for a complete resto. I beg the differ. It has good power and it doesnt burn oil at all. the only smoke coming from the tail pipe is Dark DArk black and smels like fuel. and its only when you get on the gas. (it was all the time especially at idle, not anymore) Also, I know the EGR is frozen. But it dont know if it would affect it that much. Anyways, Ask any Questions and any feedback would be greatly appreciated! thanks!!!