i havent changed anything. no mods, no driving habits nothing. anyway, my milage has dropped about 3 mpg on the highway. i used to get about 17.5, but now all i get is 14.6. any ideas. thanks.
chris

 

Put down the fork!

theres a million factors but routine maintenance and tire pressure come to mind if nothing else has changed

 

Temp, tire pressure, roads trevdeled, time idling, brand of gas, A/c on, mods? All these can play role

 

the fork isnt the prob. maybe the beer can but not the fork.

but temp has been very consistent, tire pres. checked its the same. driving habits same, idle time about same, but i have only been checking it on the interstate, and its the same trip i always take. mods, nothign different. not to mention, i changed the fuel filter about two weeks ago and it stayed the same, but this weekend it dropped fast.

should i change filter again? i am also going to clean MAF, and change plugs.

 

Could have got a tank of bad gas. Give it 2 more fillups before you mess with the fuel filter to flush all that old gas out

 

Maybe you filled up with some chitty gas...I would try changing the fuel filter, what filter did you put on?

 

My experience the last 2 tanks was similar. I wondered if it was weather and ethanol. Maybe some extra idling.

 

tell you the truth im not sure what brand filter it was. is there much of a differance in fuel filters as far as brand?

 

Not that I know of.

 

Yes there is. The first filter I bought was an AutoZone, no brand. When I got home and looked at it, I refused to put it on my truck. I went to O'Reilly's and got a Motorcraft. I am sure there are some other good brands, but I just get the MC now.

 

i'll try changing it again. do you think changing the plugs and cleaning the MAF will help?

also if i change the plugs, 1: should i continue to use motorcraft, if not recommendations. 2: should i also change the COP's as well?

 

How many miles are on the truck???

 

90,000

 

Just thrown' this out there to chew on ...

front O2's getting lazy/contaminated ?( you haven't run any weird fuel additives have you?)

---> http://www.obdii.com/articles/Replac...intenance.html

And I'd say plugs are overdue ....

Parking brake /brakes, dragging?

In other words - routine maintenance lol!

 

i've kept up on all maintenance. that is what i cant figure out. the only thing i can think of is that somethign just happened to go bad out of nowhere. i'll try some different things and keep you all informed what i find.