For the first time I considered returning her to stock:
Long story:
Well, everyone here knows of the CEL I got almost two weeks ago (P0140 - dead 2nd O2 sensor). Well, that actually turned itself off and for the last ~700 miles I was CEL free. Well I came back to school today and while sitting at a stoplight I noticed my AFR's sitting at 17.0:1 at idle! At first I'm like ok, just blip the gas and it will return to normal. Well I get back to my apartment and blip the throttle and sure enough - CEL. Well immediately I go get it read. Yep, you guessed it P0140 again but this time also P0171 - System too lean (no s***). So, I'm pretty certain my O2 sensor is dead. I just want to make sure that the P0171 is just something connected to the O2 sensor and when I replace it, it will go away. Anyone know more about this?
My other annoying thing is a leaky oil catch can. I've tightened the bottom nut as hard as I could and it's still leaking. Also, the lines I'm using for the catch can can't stand up to the heat of the engine bay and the vacuum force from my engine. Does anyone know of a type of line (3/8") that is heat resistant, strong enough against vacuum lines and won't let oil leak through (regular silicone lines leak).
Short Story:
P0140 (again) and P0171. 2nd O2 sensor dead again and system too lean. Are these two interrelated (ie if I replace the sensor will the system run normally again)?
Catch can leaking, lines getting sucked together because of the vacuum. Need a type of line that is heat/vacuum resistant and that won't leak oil vapors through like silicone.
Argh!