Gas mileage way down
#1
Gas mileage way down
I know there are probably a bunch of these but i searched and didnt find much.
I have a 2001 Supercrew F150 with the 5.4 in it. It has 105,000 miles on the motor. Oil changes have always been done every 3,000 miles. As of lately the gas mileage has started dropping it is now at 9.4 mpg mixed driving. It has cat back exhaust, cold air intake, and programmer. The truck is lifted with a three body lift and has 35" tires and 3.55ls. I used to get around twelve mpg mixed driving with the same setup but know i need to regear.
It is still on original plugs and cop. I know these need to be changed i have them on order but what else besides regearing do i need to do to get better gas mileage.
Thanks, any question just ask
I have a 2001 Supercrew F150 with the 5.4 in it. It has 105,000 miles on the motor. Oil changes have always been done every 3,000 miles. As of lately the gas mileage has started dropping it is now at 9.4 mpg mixed driving. It has cat back exhaust, cold air intake, and programmer. The truck is lifted with a three body lift and has 35" tires and 3.55ls. I used to get around twelve mpg mixed driving with the same setup but know i need to regear.
It is still on original plugs and cop. I know these need to be changed i have them on order but what else besides regearing do i need to do to get better gas mileage.
Thanks, any question just ask
#2
#3
did you program the tire size into the computer? as said before the tires will bring the fuel mileage down some. but you just do the current tire size / the stock tire size x the mileage driven / the number of gallons used= fuel mileage.
other than that you could still do some maintenance to it. like the plugs(use motorcraft), fuel filter, clean the air filter if needed, clean maf sensor(oil fom filter could get on it and cause false readings).
and other than that you may want to upgrade to 4.10 or 4.56 gears.
other than that you could still do some maintenance to it. like the plugs(use motorcraft), fuel filter, clean the air filter if needed, clean maf sensor(oil fom filter could get on it and cause false readings).
and other than that you may want to upgrade to 4.10 or 4.56 gears.
#4
#7
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#8
regular oil changes and fuel filter changed every six thousand miles. Could coolant cause a drop?
#10
Put a can of seafoam in the fuel, it will clean the injectors better than any other fuel injector cleaner on the market. I'm not saying that is the problem, but it can't hurt. I have an 86 Bronco (5.0/ FI), wouldn't hardly run. One can of seafoam helped a bunch. Keep in mind if your injectors aren't dirty you won't notice a difference, if they are you will also feel a power gain. Good luck.
#13