Maximize Engine Efficiency Replace O2 Sensors and Experience Optimal Performance

This socket is absolutely essential for removal and replacement Pre-cat sensors (sprayed with release oil an hour before) Removing is easy with the right tools. Probably not. There are two different types of O2 sensors in most cars, ones that measure for catalytic converter efficiency, and ones that ... you don't have to but it is a good idea. it lets the pcm start fresh and not have to relearn itself. don't forget that fuel milage will drop ... It's kind of like replacing a spark plug but an 02 sensor is normally in pretty tight due to the heat of what it is screwed into. To make the ... Double check those vac lines, or get me a pic of which ones they were. It culd be that your ECu is re-learning fuel trims after having tehm way ... Use a ratchet wrench and an oxygen sensor socket to unscrew it. You can also use an open-end wrench to unscrew the sensors. You'll find all kinds of anecdotal evidence that replacing your O2 sensor can improve mileage, but in the end, "it depends"; YMMV (no pun intended.) In theory, it's relatively simple to replace a bad O2 sensor. They are typically connected to the vehicle's wiring harness by a single plug and ... The new O2 sensors come with gaskets and install flush to the old plate. No welding required. To the original question: The only time I'd ... They can be a huge pita if they are really stuck. The o2 sockets are great for installing them but not always so great for getting them out.