Gas milage/power help!

I realized today that my truck seems a little weak, i was driving on the highway, kind of windy, my truck didnt have much power. I really had to punch it to get up to speed. Trying to hold 75mph was a struggle, i also noticed today my gas seems to be dropping very fast for some reason. I had about 110 miles on this gas tank and i was at half.. Normally, im around 150-170 miles on a half tank of gas... Does anyone have the same issue or no what my problem could be?

I considered my spark plugs/wires could be bad, could that be the problem?

mods- k&n airfilter, 265 a/t tires, if that matters

Thanks for the help ahead of time, Ken

 

a dirty fuel filter will give you those described conditions.
easy to replace too!

 

bad gas maybe

 

How did I know shitroc would suggest bad gas? His signature, maybe?
You didn't mention your mileage (on the odometer). I'd check/change the air and fuel filters, clean the MAF, and make sure there's no broken or loose vacuum lines. May be time for a good tune up.
Was this a sudden thing?

 

iv been noticing the same thing, about 110 miles to half a tank and lucky if i get 240 a tank. it calculating to around 14mpg. and i have a 4cyl.

what engine does the op have? and i have pretty much the same mods as the OP also cept i got 31's but thats damn near the same too

 

it called a head wind, u will burn more gas running against the wind as well as lose power

 

the wind will absolutely destroy your MPG. I drove from phoenix to tucson in a huge thunderstorm (a little over a hundred miles) and it took damn close to half a tank to get there. My problem came from having a 4spd v6 though, the head wind kept me at like 3krpm for most of the trip unless I was going considerably slower than 75.

Monitor the situation for another tank or so. I bet it will return to normal.