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My 1996 LT1 CE has been leaking a good amount of oil. I have been looking for vacume leaks since I failed smog and pulled 6 codes most are o2 sensor codes. I dont believe they could all be failing I am steal learning. The car intermintantly runs ruff. I removed the egr valve and noticed dirt /...

I need help... I have a 1996 CE LT1 / I faild smog bad. I ran the codes: They are, P031 - Bank 1 Sensor - censor circuit low volts P0134 – CKT no activity P0157 – Bank 2 – sensor 2 circuit low volts P0300 – Detected multiple cylinder misfire P0300 – Random cylinder misfire P1133 – Manufactor...