I have been attempting to remove a stuck o2 sensor from my 1992 dodge w150 5.2 magnum. There is a hole in the floor right above the sensor, we have tried everything we can think of to get it out, we've used penetrating oil and let it soak, and a big burly Milwaukee 1/2 impact. The stupid thing still won't come out, any suggestions would be appreciated. Thanks!

 

pipe wrench or fire wrench. i almost thought i was going to snap the old one off with how much force i had to put on it with a pipe wrench to get it to break free.