gas milage and overall performance

[mattmb223]

I just got a 97' expedition with the 5.4l engine and i was wondering what i can do to it to increase my mpg and performance?

any help would greatly be appriciated

 

[Grasshopper]

I'm sure there are plenty of mods out there, but the biggest thing is to keep your foot our of it. Stay less than 2000 rpms.

A good tune will help out too, with those things.

 

[mattmb223]

can i just go to the regular guy i go to, to get it tuned? yea i am kind of an idiot when it comes to this

 

[ELVATO]

Is he a tuner? A tune changes values on the car computer, so you would want someone who has experience with that kind of stuff.

But as grasshopper said, probably the biggest thing that affects MPG would be RPMs and a low freeway speed (65 mph).

 

[Grasshopper]

You'd definitely want someone with experience in tuning. Not a wrench-turner, but almost a computer scientist and programmer with access to good tuning software. Some performance shops have guys that can do this.

 

[green03]

There are dividends to be paid in fuel economy simply by changine the part throttle shifting characteristics. How much stall the factory converter has also determines how i would address shift points in my custom tune some of the early trucks have 2400 stall speed. With the loose converters i usually split the gear shifts with the torque converter lockup to make it seem like it is a six speed transmission. Power increases a little bit on regular fuel with better gains on premium.

Matt R

 

[mattmb223]

green now what would i have to get to be able to do all that

 

[gandalf1112]

Originally posted by mattmb223
I just got a 97' expedition with the 5.4l engine and i was wondering what i can do to it to increase my mpg and performance?

any help would greatly be appriciated

I increased my gas mileage from 15. to 18.3 by changing plugs and any corroded plug wire connectors at the coil packs, PCV, fuel filter, and using a Synwash air filter from Fram and driving a little less aggressive. I plan on changing my 02 sensors soon to see if that helps any.

 

[green03]

anyone wanting to call me my number is 979-324-4348 we can discuss it. It is really easy to do. I am late to respond to alot of these posts because things are getting really busy lately.

Regards,
Matt R

 

[sonnytris]

Improve MPG

There is a local garage who will drill holes in your airbox and reroutes you hoses and will inprove your mpg to 4 more mpg and charges 160 which will take 1 1/2 hours while you wiat. Will try my daughters EB next week

 

[Grasshopper]

Sounds like snake oil to me.

Beware...

 

[AvroAero]

4 mpg is a pretty high gain. After saying 4mpg and drilling holes in the intake I would start walking away.

 

[ROCKSBITE]

wow i wouldnt take my sons pedal cart to that garage!!

 

[MaverikDS]

Re: Improve MPG

Originally posted by sonnytris
There is a local garage who will drill holes in your airbox and reroutes you hoses and will inprove your mpg to 4 more mpg and charges 160 which will take 1 1/2 hours while you wiat. Will try my daughters EB next week

Yeah that doesn't sound too good...

 

[n.lowery]

snake oil, why dont you try to refill your blinker fluid to, that always helps your fuel mileage



i would put on an cold air intake, and a after market muffler. you will get a little more power, and better MPG's.

 

[Joe S.]

mine averages 15-16 around town. i have gotten as much as 18 on the highway. i agree with the above statement to stay out of it. i added a flowmaster muffler and love to hear it talk, but that sucks the gas...

on a recent road trip is when i got 18. stock intake, flowmaster muffler only, and staying 65mph or less and i got it... that aint bad for a big motor and big truck IMO...

i hope to add a full exhaust soon and intake. my bud has a 4.6 in his with intake and exhaust and has gotten just over 19 ONCE... lol

 

[phatbak]

I've done this intake mod, and with a K&N drop-in filter, you can tell a difference in throttle response and power.

http://www.f150online.com/forums/exhaust-intake-systems/297846-gotts-intake-pics.html

 

[TexasR.N.]

anyone wanting to call me my number is 979-324-4348 we can discuss it. It is really easy to do. I am late to respond to alot of these posts because things are getting really busy lately.

Regards,
Matt R

New to this site. I noticed this is an older thread, but are you still on and working on Expy's?

Craig