ok guys my 4.6 extended cab is only getting like 11 miles to the gallon? i just changed my plugs and wires and i though that may help but it didnt.... i dont know but it just doesnt seem right.... any imput on this like what are you guys getting in your trucks?

 

Are you on stock tires? I assume you used motorcraft plugs and are calculating that mileage by hand. Start going through the list of maintenance if it hasn't been done: fuel filter, O2 sensors, clean MAF, clean throttle body, new air filter, new transmission fluid, new differential oil, and new pcv valve. After maintenance and mileage has not improved, then start looking towards the whether the cats are plugged, compression test, etc.

 

I did the gotts mod, changed oil and trans fluid. That brought my mpgs from 8 to 10. Thinking after I do the rest I'll be getting around 15....i hope

 

I think this is post number one million on gas mileage.
TRUCKS GET LOW GAS MILEAGE BECAUSE THEY ARE TRUCKS.
Except of course the Ford hydraulic hybrid F250 that gets 65MPG in the city but for some odd reason Ford won't build it for everyone even though they have had it for almost three years now.
Gee, I wonder why?
No, those investments from the big oil companies in Ford have nothing to do with it.

 

fuel filter!!!!!!!!!!!!!! and take the lead ooutta your shoes

im runnin 35s with 3.55 gears and i get 12 mpg

 

Try some seafoam, cleaning your air sensors in the intake, and also try some electrical contact cleaner on all the contacts you can safely pull apart under the hood

 

Sell it and get a car if your gonna complain about gas mileage

 

I have an 2001 f150 with 5.4v8. I changed my plugs, ignition coil boots, iac, iat, MAF sensor, egr valve, pcv, vacuum lines, throttle position sensor. I am getting better fuel mileage now more than 15. I also changed my fuel filter and fuel pump went out. I have stock tires.

 

F*** the car we have just got like 4 feet of snow in the last 2 weeks in NJ im having so much fun but thanks guys soon as i get some money i will start with doing some of this stuff.... and im going to clean my TB and MAF this weekend maybe it will help a little

 

it will. everything helps but dont expect much over 15 without a programmer, which also helps