If the oxygen sensor won't break loose, try putting heat on the headpipe where the sensor screws in. If you have access to a acetylene torch, heat the pipe until it starts glowing red, and while it's hot, put the oxygen sensor socket over the sensor and use a breaker bar to work it loose. Be careful that you don't burn yourself though.
upstream
Upstream - newspaper - was created in 1996.
downstream and upstream
The duration of Upstream - film - is 3600.0 seconds.
The duration of Swimming Upstream is 3240.0 seconds.
Swimming Upstream was created on 2003-02-27.
when a body moves against the flow, it is known as upstream flow
Upstream - film - was created on 1927-01-30.
Upstream Print Solutions was created in 1995.
Upstream Print Solutions's population is 300.
Upstream Tracker was created on 2010-05-05.
Upstream - mobile marketing - was created in 2001.