05 Tacoma - Very Poor Gas Mileage???

[bacardisippen]

I just bought a 2005 Tacoma, crew cab, 6cyl, 4L, and I am getting very poor fuel mileage. From what I have read online, I should be getting anywhere from 14mpg to 20 mpg. I am right now getting about 9mpg, thats right I am getting about 300km on an 80L tank, when I should be getting 500+. My S-10 was getting better mileage than that, and we all know how great those 4.3's are on gas?. The air filter was very dirty, so I replaced it with a K&N, but that made no difference at all. So I was just wondering what kind of mileage should be getting and what can I do to fix the problem? Right now the truck is stock with TRD and SR5 packages, no modifications or aftermarket parts other than the K&N filter.

[Hoodlum]

How many miles on the truck?
Any acceleration problems?
What pressure do you run the tires at?

[bacardisippen]

The truck has 125000kms, so about 78000 miles, acceleration seems fine, but this being the only Tacoma that I have driven I have nothing to compare it to. And my tires are at 30psi, the truck reccomends 29psi, 1psi is going to make that big of an affect. I am going to replace the plugs, to see if that makes any change and I'm not getting an engine light, so that pretty much cancels out the O2 sensors.

[Hoodlum]

I had to ask the basics first. I would start with a basic tune-up.Plugs wires,pcv you already did the air filter.

[speedy]

Lift up the truck one wheel at a time and make sure none of them are dragging. The Taco I bought might have seen a little flood action. The brakes were so rusted that they were constantly grabbing the rotor. You could barely turn one of the wheels. I cleaned them, replaced the retaining pins for the pads, problem gone! While I doubt that's your problem, it's a possibility. It could also identify wheel bearing issues.

[bmilla]

You could try changing the fuel filter as well.