Alright well i have my friends 1993 Corolla 1.8L and in order for it to start i have to sit with it turning over for about 15 secs before it actually catches and when its running the exhaust smells like its running lean.... Im thinking O2 sensor, is there anyway to pull codes? once it starts though it seems fine. at some point in the past the o2 had some water get on it,before the head gasket was redone, could this cause it?