What fuel mileage are you getting with your 3.4 swap?
#82
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Join Date: Feb 2011
Location: Folsom, CA
Posts: 128
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Added the S/C
So added the S/C and mileage did not get worse but did not go up either. I put in a new O2 in the front due to my Fuel Trims being outta wack. Didn't help much. As soon as I have the dough I am going to pick up a used OEM cat with down pipe from Ivan (if he still has it) to see if that helps. I went over my wiring and can't figure out why I am having this issue. The fuel trims point to a lean condition but my mileage is terrible so who knows. Anyone in Sac area that would be willing to help diagnose? Or any other ideas? I have no fuel mods yet. Still running stock injectors with a stock pump. Kinda feel like I am highjacking here.. Sorry
#83
Registered User
It's been around three years since I completed my swap and I consistently get 17-18 in the summer with lots of A/C usage, and 18-19 during the rest of the year. If I put the soft top on I can sometimes eke out 20. These are all city MPG figures.
On the highway I get 20-21 MPG depending on A/C use with just a light load. When I tow the pop-up camper and are loaded down I get about 16MPG. By the way, I drive around 70-73MPH on the highway empty and around 65-68 towing the trailer.
I'm currently running 33x10.5 BFG All terrains with 4.10 gearing and a 5 speed. I also have an electric fan.
On the highway I get 20-21 MPG depending on A/C use with just a light load. When I tow the pop-up camper and are loaded down I get about 16MPG. By the way, I drive around 70-73MPH on the highway empty and around 65-68 towing the trailer.
I'm currently running 33x10.5 BFG All terrains with 4.10 gearing and a 5 speed. I also have an electric fan.
#85
Registered User
My best was 26 mpg. I average more in the 22 mpg range (mixed city and highway) most of the time. But 5 years and over 200,000 kms later, the thing is still a blast to drive.
#87
Registered User
I wish the R150F had a taller 5th gear. I believe it has a .83 and the auto has a .70 OD. If I could get a 5th gear in the .70 to .75 range then the RPMs would drop and MPG would likely improve. Does anybody know if this is possible?
#89
Registered User
That's a bummer. I don't want to regear to 3.90. I guess I'll try to drive 65-70 on the highway to keep the RPMs down, but it is difficult with the easy power of the 5VZ.
#90
Registered User
95 runner 3.4/A340H
new o2 front,tps,ects cleaned iac valve and tb
3 codes.. tranny speed sensor,evap pressure sensor and rear o2 sensor (its been disconnected)
i'm getting 10 in town not sure on the hwy..
cant wait for the 5 speed swap..
was hoping for 14-15 city.
new o2 front,tps,ects cleaned iac valve and tb
3 codes.. tranny speed sensor,evap pressure sensor and rear o2 sensor (its been disconnected)
i'm getting 10 in town not sure on the hwy..
cant wait for the 5 speed swap..
was hoping for 14-15 city.
#91
Registered User
Limp Mode ?
David,
With the three codes you are getting I beleive your ECU is running in limp mode. The O2 will really affect your milage. UDR can take care of your rear O2 issues.
http://urdusa.com/Electronics-Rear-S...170/index.html
With the three codes you are getting I beleive your ECU is running in limp mode. The O2 will really affect your milage. UDR can take care of your rear O2 issues.
http://urdusa.com/Electronics-Rear-S...170/index.html
#92
Registered User
Interesting runs like a top, little rich with a gas smell but that's it..
Ill be ordering that o2 sim see what happens thanks for the tip didnt know about the ecu going into limp mode with 3 codes..
Ill be ordering that o2 sim see what happens thanks for the tip didnt know about the ecu going into limp mode with 3 codes..
#94
Registered User
Rear o2 sensor
David,
I am pretty sure without the rear O2 sensor connected the check engine light will be on and the ECM will go into limp mode because it is an emissions issue. I do not know about the evaporative canister pressure.
I am pretty sure without the rear O2 sensor connected the check engine light will be on and the ECM will go into limp mode because it is an emissions issue. I do not know about the evaporative canister pressure.
Last edited by auassay; 01-09-2013 at 12:02 PM.
#99
Registered User
93 pick up ex cab
open 4:10's
33x13.50 meats
no lift
14 mpg city/4wd over the pass
MAYBE 16mpg on the highway if im not passing any stupid prius'
Both O2 sensors hooked up, however i am not running a EVAP box because the donor (96 t100) did not have one. I
open 4:10's
33x13.50 meats
no lift
14 mpg city/4wd over the pass
MAYBE 16mpg on the highway if im not passing any stupid prius'
Both O2 sensors hooked up, however i am not running a EVAP box because the donor (96 t100) did not have one. I
#100
Registered User
Did you get the vapor sensors hooked up? The vps feeds to the ecu and will throw a code and maybe affect gas mileage..
canister won't,sensor will or so I have heard..
canister won't,sensor will or so I have heard..