kfred21

i've posted about this before but left a few things out. i bought my '94 z28 a little over a month ago and am having a little problem. first of all i know it has a bigger than stock cam. i think it might be a gm hot cam. not sure. also there is an exhaust leak at least on the passenger side exhaust manifold. also no cats, and the tailpide is only spot welded to the muffler because the metal on the muffle will not hold. the air filter is useless right now because there is downtube wide open before the throttle body. when idling for a minute or so the ses light comes on. i'm pretty sure my car is running rich because of the way the exhaust smells and sounds. the only codes that are popping up are that my o2 sensors are reading lean. when i hit the gas in low rpms the car sputters. to be honest i dont know where to start. any bit of help would be great. thanks

kfred21

one more thing i forgot , egr/air delete. thanks for any help