I am looking for a chip/programer/tuner for a 1999 F250 Superduty 5.4 V8 Gasoline 4x4 that would give me the best MPG. Horsepower doesnt really matter to me i am looking for something that would give me the best fuel efficiency because 9mpg is too low!!!The truck does have a lift on it

 

Have you read the sticky threads at the top of the forum yet?

https://www.f150online.com/forums/ch...unes-read.html

 

I havent found anything that would help me out with more than 1 mpg gained

 

It's highly unlikly you will get that much. A tuner will not pay for itself in economy but sure makes driving a lot more fun.

 

would a chip be any different?

 

A chip won't work, you have to have a handheld tuner. You need to read the stickies.

 

Which Tuner would you recommend?

 

Courtesy of 88Racing's signature:

Programming Devices>>Company Info Links
SCT>>www.vmptuning.com
SCT>>www.5startuning.com
Gryphon/SCT>>www.gopowerhungry.com
SCT>>www.troyerperformance.com

 

Control over your foot and proper maintenance will go a lot further than a programmer in trying to achieve better gas mileage.............

Programmers are a 50/50 crap shoot on getting better mileage.........

 

If the op has a 97-03 f250.
A multiposition flip chip would.
Tuners still offer this option along with a single program one also.
Handhelds/dash mount programmers offer more end user adjustments......
Just in case you want to switch tire sizes, gears, shift points/firmness, etc........

 

Looks like the OP has a 99 F-250 SD 5.4 if that makes a difference.

 

I went PHP's website to see they had to offer for the op's truck.....
http://www.gopowerhungry.com/_produc..._vehicles.html
Looks like........
The CS.
The CTS.
Phoenix 6 position chip.
SCT.

 

He can use a chip in a 99 but no it would not be any better than a tuner. Chip versus programmer is like paper versus plastic; they are both just containers for the tune.

 

Thank you all for correctin me, I forget that the 97-03 years are different fron the 04 and up.

 

a freind of mine has a 97 1500 z71 with the 5.7 vortech and he programmed it with the hypertech max energy programmer and he went from going a little more than 80 miles off 7 and a half gallons of gas to going about 120 miles. as long as he kept his foot out of it it helped on gas mileage alot. i kno thats its kinna out of left feild but i see everybody on here sayin programmers dont help gas mileage and i kno they do.