the truck feels like it's lacking a little oomph, like it has to work a little harder than I feel it should to get up to speed and maintain speed. I've heard the things to check in this case are spark plugs, throttle body and EGR. Is that right? Side question: could any of those things contribute to a lean condition?

 

what engine? if its the 4.9 staight six they aren't so quick.

 

It really could be any number of things. A kinked or leaking vaccum home, EGR, MAP sensor, clogged fuel filter, etc. Are there any codes? Is the MIL light working?

 

sorry, for those who haven't been following my saga o' threads: 5.0L V8 4WD, fuel filter has been replaced recently. Only persistent trouble code I have now is 311 (inoperative thermactor system) although I have also gotten 172 (lean condition) and 225 (knock sensor not detected)

 

I would try a tune up. You would be amazed at what it would do.
Plugs, wires, cap, rotor. My truck was feeling a little sluggish and I ran some Lucas fuel injector cleaner and put a tune up on it. Ran alot better. Try the obvious stuff first. A majority of the time it's the simple things.

 

spark plugs are definitely on my list, possibly the very next thing, although the ol brake rotors are begging for attention as well

 

I get my front brake rotors at junk yards. Them rotors don't usually get warped. That's the cheapest place to get them. Buy them at a parts store yer looking at $60 a piece vs. $20 to $30 at the junk yard

 

I warp my rotors every six months, and I buy them brand new for $30. Two years of free replacement.

 

I wasn't planning on replacing them, just getting them turned. and what are you doing up at 3:30 in the morning sean? isn't that past your bedtime? :P

 

You shouldn't be warping rotors every 6 months. You have to torque your lug nuts between 85 and 100 ft lbs. You do this, and you wont warp a rotor. If you turn them, they get too thin and then they can't dissapate the heat. New rotors and then torque the lugs.