97-02 4.6 engine and mpg
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2003 F150 SuperCrew Lariat 4.6L
I hold 65-67 on cruise on the highway. My tranny seems to feel stronger at the lower RPM, if I get up to 70, it kicks out of O/D anytime I go up even an overpass. Always has. Maybe the factory set a shift point a little off or something? or maybe I need a new PCV... either way -
In New Mexico / Amarillo runnin highways I was getting 21-22mpg City 16-17. (I think it was all about the dry climate and slightly thinner air.)
Houston area now (gulf coast humidity) slightly larger tires and a flowmaster puts me at 17.5-19mpg on the highway and 14.5-15 in the city.
I hold 65-67 on cruise on the highway. My tranny seems to feel stronger at the lower RPM, if I get up to 70, it kicks out of O/D anytime I go up even an overpass. Always has. Maybe the factory set a shift point a little off or something? or maybe I need a new PCV... either way -
In New Mexico / Amarillo runnin highways I was getting 21-22mpg City 16-17. (I think it was all about the dry climate and slightly thinner air.)
Houston area now (gulf coast humidity) slightly larger tires and a flowmaster puts me at 17.5-19mpg on the highway and 14.5-15 in the city.
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#12
Usually get around 18 going easy on the highway. 4.6 4x4.
Yesterday I ran my Dad up to the hospital (about 30 miles at 80-90 on the Highway & a tad less through town )...
Somehow managed to suck down about 6 gallons of gas.
Granted, it does not have a tune and I'm running Commercial Traction tires, but 6 MPG average? Ouch!
She has hardly any 0-60 umph and keeps dropping out of overdrive on the hills.
Should I just shoot it now, or is there something that can be done for both power and performance?
Thanks for any ideas,
SOHC
Yesterday I ran my Dad up to the hospital (about 30 miles at 80-90 on the Highway & a tad less through town )...
Somehow managed to suck down about 6 gallons of gas.
Granted, it does not have a tune and I'm running Commercial Traction tires, but 6 MPG average? Ouch!
She has hardly any 0-60 umph and keeps dropping out of overdrive on the hills.
Should I just shoot it now, or is there something that can be done for both power and performance?
Thanks for any ideas,
SOHC
#13
My 1997 Ext cab 4x4 4.6l is getting around 16 hwy if I drive it easy around 12 in town. It's going down now, but its starting to miss and stutter under load a little, so as soon as I can save up my pennies its going to get new coils packs, new wires and new plugs along with a new fuel filter, and a pcv. hopefully that will get her runnning back on the sweet side and the mileage will creep back up.
#14
My 2002 Supercab 4x4 with 255/70-16 tires, 3.31 gears and a 5.4 usually gets about 17-19 on the highway, closer to 10 in town which is mainly stop and go. Towing roughly 7k is an optimistic 10, the gears that help my milage empty really hurt when it is loaded down loaded, I need a two speed rear axle .
#15
When stock, I averaged 13 city, 16 highway. With the tuner on 87 octane performance tune, I upped the average to a little over 14 city. I have not done enough time on the highway to give an accurate highway average. I have just reprogrammed with the 91 octane tow-performance tune, and am waiting to see results. This coming Thursday, I will be installing 3.73 gears and hope to increase mpg all the way around. Stock with the 3.08 ratio, it would downshift on the slightest grade. The programmer helped reduce this some, but the gears will help most.
The wife's 05 Explorer 4x4 with the 4.6 Windsor and 3.73 ratio gets 15 city, 19 highway in completely stock form. Compared to my F150, the Explorer feels like it breathes fire . . .
The wife's 05 Explorer 4x4 with the 4.6 Windsor and 3.73 ratio gets 15 city, 19 highway in completely stock form. Compared to my F150, the Explorer feels like it breathes fire . . .