Help! terrible fuel mileage

[joeyjarvis23]

Ok, so i have a 97 f 250 with 200,000 it has exhaust, chip (ts) and intake.. the truck has 35's and 3.55 gears. i just bought truck, so today i traveled to a town 70 miles a way with a empty 16' trailer my egts stayed around 1200 Degrees and i burned half a tank each way... Where should i start what could be wrong please help!!!!!!!!!!!!!!

[351fifty]

check your fuel filter? intake filter? those could possibly have something to do with it

[pork chop]

Crap! What program were you on?

[superduty4x4]

Check for boost leaks and exhaust leaks at the up pipes.

[joeyjarvis23]

ive tried all positions on kt performance chip.. i just relaced fuel filter and air filter..... thanks for the replys keep them coming

[Chop]

With your EGT's at such a high level,I would think lowering these temps should help with mpg's. Gotta a dp ?

[nbeavor]

make sure that the fuel filter is really tight. I changed my fuel filter a time or two and didn't tighten it enough and had crappy mpg.