Well im finally getting around to working on my truck. For the past couple months ive been getting really bad mpg as low as 6mpg and as high as 10 mpg so I figure with 86,000 miles its time for a good tune up. I figured with the money I have been making from scrapping its time to put that money towards my truck allthough I wish it were aftermarket stuff but oh well. anyway im doing plugs,wires,maybe new rotor and cap and o2 sensors clean the map sensor anything else I can do to maybe help my mpg also any good brands to use I know our trucks like the autolite plugs but not sure o2 wise?

 

Definitly do cap and rotor too. For the few dollars they are, you might as well since you got it all apart.

Check your air filter too...
Clean your TB
Just make sure your tires aren't too under-inflated, that never helps gas milage.

And you shouldn't need o2 sensors unless you have CEL telling you so. It's a pretty expensive thing to do if there isn't anything wrong with them. If your o2 sensors think there is a problem, they will tell you.

 

Well I thought that would most likely be the problem of my mpg I have a code p0443 but I thought that wouldnt be the source of my big drop in mpg everything seemed fine until I put my exhaust I dont know if that just happens to be coincidence or what. Ill take out my o2's and test them just to make me happy lol

 

good luck removing ur o2 sensor. for the 4.7l its hellish. i couldn't do it. i ended up breaking my ratchet.

 

Well I have the 5.2 so we will see and thats why I have craftsman I break one about every month lol

 

gotta love living down a little south aint gotta worry bout rust, so mine would prolly pop right out lol :P

 

pcv valve. seafoam treatment.

 

+1
Could always lift your foot a bit too haha jkjk

 

It doesnt matter if I take my foot out of it I still get like the same mpg. Im doing plugs,wires,cap and rotor today along with cleaning my tb and map. well see how she responds to it. what should I use for cleaning the tb?

 

i used carb cleaner. take it off it's real easy, just watch any sensors or plugs.
i got pics in my garage if u want, diff motor but u'll get the idea.