Bad gas mileage

Mojave, where did you get the charcoal canister?

 

no

it is the air fuel sensor in front of the cats (sensor 1) which totally affects how much the injectors spew

 

Find anything out? My trucks all of a sudden become really bad as well. Used up over a 1/4 tank of gas from Full and only driven 19 miles.

 

Following.

Mine is awful too. Im getting 12.5mpg. Plugs were replaced 15k ago by the dealer as well as the fuel filter and 3 ignition coils, used multiple fuel injector cleaners, cleaned MAF, got an alignment and it has remained the same. Check engine light works but is not illuminated. I'll have to check fuel trims

 

Nothing, same thing. Only things left are the fuel injectors and the coil packs....not sure I wanna spend the money on that yet though.
Am still interested where Mojave got the charcoal canister?

 

For what it’s worth I switched the rear diff oil over to synthetic and the truck seems to roll better after you release the throttle. Maybe new shocks might help, too

 

My v6 gets 19. Muffler delete,(for fun) new plugs, run no ethanol for a lil bit. If sluggish check out cats. Beyond that it gotta be motor components I guess.

 

V8 swap for improved mileage

 

1/4 tank in 19 miles? You have a hole in your tank, lol

Or your fuel sender is bad.

 

My full sender works perfectly well on my truck!

 

Full send?

https://www.youtube.com/watch?v=JKQdlXvbWSU

 

I bought mine at Rock Auto but it was for the 3rd gen 4Runner.

 

You really need to get some fuel trim data. It could be a massive vacuum leak..

 

Amazon sells them too.

 

What do you mean by fuel trim data?
As far as a vacuum leak I should go to a shop that has smoke machine I'm guessing...

 

Amazon also sells books and games, and as a horrible track record of car part fitment knowledge.

Buy from an auto retailer.

 

Fuel trims are the computers strategy for fuel delivery and is invaluable in diagnosing many issues.

You can go to Walmart and get a scanner for $40 which will read live data stream. From there you could watch a video on how to diagnose using fuel trims. The fuel trims and O2 sensor data will tell you a lot even if the computer is not sending a code.

 

Thank you Arizona

 

But in the meantime if you wanted to check for a vacuum leak you could visually check the hoses and make sure everything is connected. Likewise you can get a spray bottle and start spraying the rubber hoses,around the intake manifold, etc.. & listen for a sucking sound.

 

But it could be a lot of different things. I would like to see the MAF readings as well. Having your own scan tool will help others help you on the internet in addition to helping yourself.