Usually when you try to replace the O-rings on the bottom of that fuel injector, 99.9999999% of the time you'll break the brown plastic piece right below that O-ring, so you'll have to replace the whole injector at that point. Im guessing that yours has never been change? Which isn't necessarily a bad thing, cause they are meant to last the lifetime of the vehilce... in most cases. But if you're planning on buying some, really all you need to do is replace the bad one, don't get into a habit of buying stuff you don't need. What happens if the injectors aren't your problem after you've replaced them all? Then your out hundreds of dollars... Couldv'e used that money to fix the problem, you know? Or something else more important. At the end of the day its your money, Im not gonna be the one to tell you how to spend it. Just try to help you to not make the decisions I have made from buying things I didn't need. Also don't over look sensors, sometimes they can cause misfires also. Its rare, but it does happen. FiveFingerDeathPunch is right...(Your stock injectors are 33lbs)
