Skydog1

2002 3.4 from a 4runner in a 89 pickup swap done 2 years ago.
36x13.5 r15 iroks
5:29's
getting 13mpg even with the rhino liner paint job

Austin Marr

Vapor sensors? lol got a pic?

david braun

Yea I'm getting a canister from a fellow member from here for a 3.0 and some vsv's but ill need the 3.4 vps.
Just drove it and its getting 12 with pretty steep twisty roads.

All these codes affect the ecu in some way or another only one I'm not sure about is the down stream o2 which should have no affect on it...

Bigblock

4.87
5 speed
33 swampers
20 overall average mpg

david braun

Just installed a charcoal canister sensor and vsv's and i am now getting 16 hwy!

Pretty happy didn't see how the tank pressure sensor would affect the ecu but it does some how.
also starting quicker in the mornings to.
thanks for the help and the evap system sacrunner!

vasinvictor

iTrader: (3)

I'd just like to throw out that I get 22+ without a canister or vsv installed and check engine light blazing most of the time because of it. Pretty sure it has zero effect on economy. It's just a warning of emissions failure.

david braun

What trans are you running? Sounds like a 5 speed
I still have the old a340h which sucks but I'm sure once I do the 5 speed swap ill get 20-22 mpg
All I know is since I installed a factory air box and complete evap system it has been running a lot better, I still have not hooked up a down stream o2 yet..
I know dosnt make any since to me either, unless the computer goes into some sort or run rich mode if more then 3 codes pop up only thing I could think of..

vasinvictor

iTrader: (3)

My signature is my current setup. A340f from doner (in case you're on mobile and can't see it). Also swapped from 4.88 to 4.10s.

david braun

Yea I am mobile thanks
Switched from 488 to 410? The newer trans is better I hear no hydro trasfer case to take up power
Off the top your head what rpm you running at at 65-70?
Pretty sure I have 488
I'm at 3500 at 70-75
60 is almost 3k

vasinvictor

iTrader: (3)

I am running only anout 2100rpm at 65 with a 255/85/16 tire and the 4.10s. Its easy to see why I am getting better economy than you. Also I am using an Inchworm adapter with the old gear driven transfer case so I'm not sure how that helps/hurts in the economy department. Your mpgs are probably about right for your setup.

david braun

Nice yea my rig is getting what it should for the stock gearing althow I was able to find somebody with 410s who needs my 488s so it works perfect.
I'm wanting at least 2300-2500 at 65..
Never thought 20+ mpg was posible with a auto thanks.

BigBluePile

iTrader: (3)

1986 4Runner

1997 3.4L with stock "turbine" MAF
4.88's elocker f&r
~35" tires

sc'd with 7th Injector
Stock pulley
~5k lbs rig

I range from 11-16 mpgs on 92 octane

trevdog

Just finished my 3.4 swap and also swapped the rear axle out of the donor truck (locker and 4.10) Swapped the front diff out too since my truck had 3.83s. I'm only getting around 16-17MPG, which is a bummer, I was expecting a lot more. My tach says 3,000rpm at 70mph, which is pretty close to what I remember with 3.83 and 31" tires. Oh well, I didn't really do the swap for economy.
'93 pickup
Manual r150f
33" BFG AT
4.10
2" body lift