MPG Problems
Junior User
Joined: Jan 2004
Posts: 88
Likes: 0
My 85 F-150 Short Bed, 4 X 4 ,351 4V H.O., 3.54 gears (9 inch Ford rear), has always gotten 10 miles per gallon. It has 32 x 11.50 x 15 BFG All Terrains, Jacobs Computer Ignition, Duel Exhaust- 2.25 in from manifold to rear of truck with Flowmaster Delta Flow 40 Series mufflers. K&N High Flow Air Filter, Plugs indexed. It averaged 8-9 mpg before any mods were added. None of the modifications helped gas mileage other than the exhaust. Exhaust was added last, so possibly, exhaust worked with the other modifications.
Thread Starter
|
New User
Joined: May 2006
Posts: 23
Likes: 0
I'll check the cat, I'm pretty sure since my truck is old enough I can actually remove it here in BC. I could be wrong though.
Everything else has been done already, new filters everywhere, plugs, cap, rotor, timing...EGR valve tested..havent checked the 02 sensor.
The other thing is, the truck is an absolute slug. Seems to have little power overall, my 93 V6 toyota with the same tires had waaaaay more juice than this thing, and it got better mileage.
Leads me to beleive that the engine is on its way out. I'll keep driving it until she wont go anymore.
Everything else has been done already, new filters everywhere, plugs, cap, rotor, timing...EGR valve tested..havent checked the 02 sensor.
The other thing is, the truck is an absolute slug. Seems to have little power overall, my 93 V6 toyota with the same tires had waaaaay more juice than this thing, and it got better mileage.
Leads me to beleive that the engine is on its way out. I'll keep driving it until she wont go anymore.
Posting Guru
Joined: Oct 2004
Posts: 1,229
Likes: 0
Originally Posted by mopar
My 85 F-150 Short Bed, 4 X 4 ,351 4V H.O., 3.54 gears (9 inch Ford rear), has always gotten 10 miles per gallon. It has 32 x 11.50 x 15 BFG All Terrains, Jacobs Computer Ignition, Duel Exhaust- 2.25 in from manifold to rear of truck with Flowmaster Delta Flow 40 Series mufflers. K&N High Flow Air Filter, Plugs indexed. It averaged 8-9 mpg before any mods were added. None of the modifications helped gas mileage other than the exhaust. Exhaust was added last, so possibly, exhaust worked with the other modifications.
Not to be a typical NW chapter member, and hijack the thread, but I just wanted to say that I have almost the exact same truck as you. F150 4X4 351 4v HO. Mines a longbed with 3.50 gears (9 inch). I've always gotten at least 12 mpg as long as I don't have the hubs locked. My only mods are headers (didn't help mpg) and 6" lift on 35's... LOL
Junior User
Joined: Jan 2004
Posts: 88
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
