Leveled F150

Be been gettin 10 mpg here lately and my truck just seems sluggish. I just put some new times on it and I understand they are little heavier than my stock rims and tires and i dont expect to get awesome mpg but they can't possibly be hurting it that bad.

TxCustoms89

iTrader: (1)

Have you cleaned air filter?....maybe fuel filters clogged.

Leveled F150

Air filter is brand new and it could possibly use a fuel filter but the engine also feels sluggish like it doesn't have enough power. How often is a fuel filter suppose to be changed?

blackbetty

30k.

Plugs are 100k but your better off @ 40-60k.

Mileage for your rig?

Leveled F150

I have 123xxx on it now and I doubt the ifs were changed on it before I got it about 23k ago. The fuel filter has about 10k on it. Could the plugs hurt it that bad?

Jono6716

Clean your throttle body.

otto457

https://www.f150forum.com/f2/ultimat...133049/index3/

Start here

Colin C F

I Gaped the plugs to 0.045, they were grater the 0.050 (manual gives a range of .41-.47) and cleaned everything.

Unlimited HP

My mpg dropped by 2 when I put my new AT tires on. What was your mileage before the new tires went on?

16IngotFX4

Don't forget this is an 8 year old thread bumped by random spark plug pictures. If you aren't replying to the post made today, you're question are probably falling on deaf ears.