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Question for 3.0 owners

4K views 12 replies 9 participants last post by  BigChalupa 
#1 ·
1988 4Runner
3.0
240,000 miles
5 speed
32x11.50 off brand tires (sort of an AT style)

As far as I know it is pretty much stock. I have given it a complete tune-up, checked the timing, dropped and cleaned out the fuel tank, etc.

I understand that it is a 3.slow. I can, if I anticipate traffic and hills, run 60 (almost 65). It seem to be horribly slow. Mixed driving returns 12ish MPG.

Eventually I plan on doing the 3.4 swap but its just not in the time or money budget right now. What I want to know is what are other 3.0 owners getting for mileage and how it seems to do with 32s?

I am trying to figure out if maybe there is anything I do to try to find some missing HP or just grin and bear it until I can do a swap? The swap is not in the foreseeable future.
 
#2 ·
Are you sure that your rig didn't come with 225/75 R15 tires? You may be way undergeared. My 1990 pickup had that engine, and I ran 30's since it had the small tire package. I got around 20mpg. Just one theory...
 
#4 ·
Well...those 4runners certainly didn't come with 32's stock. They either came with 27's -or- 31's. If it came with 27's, then running 32's would make it gutless. That is the theory I am going with...
 
#6 ·
That 4runner probley has 4.10s which toyota used with 5speed 4wds 22re and 3.0s with 225/75-15s(28s). Factory 31s weren't an option until the early 90s and they used 4.56 gears with them on either engine with 5speeds, a/ts got 4.88s with 31s. You'd want at least 4.88s with that engine and 32s, but some else has to be wrong to not be able to go over 65.
 
#10 ·
i to have an 88 4runner with a 3.0. i am running stock 4.10s and 33" mickey thompson mtz. i can run a gps confirmed 70-80 all day.
 
#13 ·
You got something going wrong. My 1990 pickup with a 3.0 and 31x10.50 mud terrains will run 100 mph down the highway any day of the week. Its also all stock. You must have some different gears or something. Also i got like 15 mpg.
 
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