How does your rig handle on the highway? Also--HOW are you getting 20-19 MPG. I run 87 sometimes 89 and get, on the highway, 13.45 mpg no matter what. Going up hills with people in the back? 13.45. Heading on I-40 for 200 miles with no climbing or crazy passing? 13.45. Coupled with the shaking and the still loose steering, I just avoid highways.
Hey Keaton! My rig loves the highway honestly. It’s not winning any races, but if I can hit hills at 70-73 I can pull a lot of them in fifth, even if I end up doing 60-63. No shakes, no pulls, I am getting comfortable with taking 4th gear up to around 3300-3500 sustained to keep with traffic. That being said I try to stay out of the throttle as much as possible and let the truck set the pace - old 22re habits. I do have the knock sensor bypass (code 52) so I try not to bog it too much and err on the side of downshifting if I feel like it’s getting loaded.
I think there is a bunch of factors that go into the mpg.
Motor: cleaned injectors with fresh seals on them, valves cleaned and clearanced, oem plugs/wires/distributor, EGR/cat delete, fresh rings, synthetic 5/30, oem exhaust
Drivetrain: ADD delete, 5speed manual (this is a big one I think), 4.56 gears, synthetic fluids in all cases
Tires: 33.10.5.15 ko2’s which are lighter than most tires as well as not an overly beefy tread + aluminum SR5 rims
Other: I deleted the AC compressor and belt - I have had mixed reviews from old toyota guys. Some people say it makes no difference because if it’s on the truck but not on it doesn’t tax the system. I was the one that pulled it off and I saw the pressure that AC system had in it, pretty incredible. Kind of like your ADD hubs we talked about, they could be moving even when disengaged - I felt that way about the AC.
Making sure no breaks are dragging all the way around and that the hubs, bearings and joints are well greased and in good working order.
I have noticed a difference with running premium fuel.
Keeping the weight down with just the minimal amount of gear and no giant bumpers - I could probably get more if I pulled the roof racks off, but I really like the look and don’t get any extra sound from it. I will probably pull them next winter.
Sensors are another issue - I replaced the ignition coil module with a used module (was throwing a code), also replacing the fuel filter. The big one here was replacing the o2 sensor with a denso oem one - even though it never threw an o2 code.
Advanced timing to between 11-13 (possibly lessened the mpg, but I felt like i would be better off staying out of the throttle and letting the advance work then fighting the pedal and gears to keep up good speed.
Tires run at a firmer pressure.
And that’s basically it. Honestly I went from 15-16 average in town to 18 in one tank, had been running a few thousand at the lower average. They run the same kind of gas year round up here, so I can’t account it to that. I think the motor is just finally breaking in after the rebuild.
