Bad mpg

I have a 2010 4.0l Tacoma trd. 4 inch lift 33s and muffler delete still has cats. I’m getting about 7 mpg I changed spark plugs but am wondering why my gas mileage is still so bad?

 

Plus winter gas.

 

Don’t think I have winter gas in my area

 

What tire pressure are you running on that lifted brick??

 

40-45

 

Head winds prevalent in the area?
You travel both ways up hill??

 

Have you tried checking the blinker fluid? I know that can weigh the truck down quite a bit actually...

If that doesn't work, I'd recommend doing an exhaust redirect. It helps your air intake and usually doubles MPG

 

Not very windy but there are a good bit of hills in my area. Anyone think it could be o2 sensor or clogged cat?

 

Blinker fluid in tact so aren’t my muffler barrings

 

You a lead-foot? If you're pushing that pedal down like a racecar, that may contribute to the issue...

 

No I’ve been driving easy. Forgot to add it’s a 6 speed manual

 

Plus 4" lift and 33s. That doesn't shock me.

 

Have you done any other maintenance besides plugs. Like throttle body, maf, trans fluid drain and fill, injector cleaning etc?

 

I don’t think it should be getting 6-7 mpg though

 

Also how many miles? 4x4 or 2wd?

 

Do you have a truck full of trolls? Cuz they are quite heavy and WILL affect mpg.

Gotta kick em out.

 

I haven’t had the truck very long haven’t done any maintenance other than oil change and filter every 3k, plugs, air filter change I can’t thing of anything else off the top of my head

 

100k 4x4 trd off-road package

 

Truck feels like it’s dragging more than it should also even with the lift and tires

 

I’d make sure your spark plugs are gapped correctly, just changing them to new ones may not help, or possibly make it worse if the gap is way off.
I forget what the 1gr calls for as far as the spec though.

My next guess would be one or two of the cats, and/or o2 sensors. Any of those gone bad can cause terrible mpg.

The heaviest influence though is the right pedal, that said, 7mpg is worse than usual. I got 10mph while towing 4000lbs and have 4+” of lift and 33’s. I usually get around 14 mixed unloaded.

Also, make sure you are compensating for your larger tires. Ie: 33’s are about 6% taller than oem tires. Let’s say you go 250miles on a tank of gas, 18 gallons used. [250+(250*6%)] / 18 will be your tire mpg.