My NX2000 bogs, especially at WOT (wide open throttle). It's weird. Sometimes it bogs when at WOT, and sometimes it doesn't. I changed the spark plugs and wires and it did feel smoother, but now the bogging is starting to become inconsistent. Like, I would drive to my girlfriend's house and it would bog like crazy. When I'm going home, it's a smooth drive. What do you guys think? I'm thinking the fuel system needs to be cleaned, perhaps? I did pour some STP fuel injector cleaner in the tank, but that was after I filled it up with a full tank (d'oh). What should I do? I've already changed the oil to Mobil 1 5w30 syn. oil and I plan on changing the distributor rotor and cap, radiator fluid and transmission fluid later on. What do you guys think? Sorry for the long post.

Changed your fuel filter lately?

You might also want to put some water remover in your gas tank, that fixed a similar problem for me. Do that, and change the fuel filter. For gods sake, relieve the fuel pressure before you change the filter though, by pulling the fuel pump fuse while the car is running.

Thanks a lot. I learned the hard way about changing fuel filters when I was doing that with my civic. Didn't take out fuel pump fuse and BAM!, a little fuel leakage. If the water remover and changing the fuel filter doesn't work, I'll probably just do this:

http://www.se-r.net/car_info/problems/index.html?S=b8b60c44edde3e62a37b124203ed65ee#Surg e and hesitation

Thanks again.