Toyota T
That's outstanding gas mileage, as compared to my carburated 20/22R's 16 MPG. Are FI engines really that superior?
Thanks.

Well, I've never owned a carb 22r to compare. Keep in mind that is under perfect conditions. Plus, I have my stock 4.10's and 31's. No re-gearing for me and the concrete jungle I put up with (the extra torque really helps with this setup too).

Around town I'm probably lucky if I pull 16. But, on the highway, Keeping it below 70 and not a ton of weight in the back...I can manage over 20 pretty easily. Hell, I've managed over 20 with a big block Mopar engine in the back as long as I don't push her above 70.

This beast does not like to idle below 850 though. 950 seems to be about right from what I can tell.

T.

i can get my 22r with a weber 38 carb to idle as low as 450 rpm if i want (not that i want to), its very tractorish, these engine were tractor engines after all. only bad thing is if im climbing a big hill it bogs down with a carb. this is the #1 reason efi is better off road in my opinion.theres always pane!

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Well, I've never owned a carb 22r to compare. Keep in mind that is under perfect conditions. Plus, I have my stock 4.10's and 31's. No re-gearing for me and the concrete jungle I put up with (the extra torque really helps with this setup too).

Around town I'm probably lucky if I pull 16. But, on the highway, Keeping it below 70 and not a ton of weight in the back...I can manage over 20 pretty easily. Hell, I've managed over 20 with a big block Mopar engine in the back as long as I don't push her above 70.

This beast does not like to idle below 850 though. 950 seems to be about right from what I can tell.

T. [/quote]

>>>*This report is interesting and I have heard it before. At this point I still cannot completely explain the few reports of chattery idle, except that typically I hear it combined with exhaust system improvements.

I was listening to one a few weeks ago that fired up in one of our local dealer's shops, stock manifold with 2" into 2 1/4" and EFI. It sat there running at 850 and I would guess I could set an egg on the valve cover and have it stay there.

Of course my son Tod built it, fully balanced and quenched with just the StreetRV head and the 261C camshaft, nothing fancy. Just a sweet street setup.

Still, every once in awhile I have someone even send one back, completely unable to figure it out. So far, 100% of the time I have checked, cleaned it up and sold it as used and next time it runs just like we expect...???

On mileage, all the dyno tests we did were at sustained throttle with the fuel curve read at a specific RPM. There was zero difference, the same as math indicates and that convinced me. Those tests are always run at full throttle/full load or part throttle/full load so they don't duplicate real world that well, they are done for comparisons.

Typical daily driving is almost constant throttle motion.

The folks who DO report mileage gains without fail I suspect have a heavier foot than others. This makes some sense as added power gets a vehicle up to speed more quickly and more fuel is used getting up to speed than cruising by far. I can't explain the reports of improvements on trips, the fact is there should be no difference.

But as always, I find myself interested....*EB

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So are you saying this is a bad thing I have to idle her at 950, EB? lol. My exhaust is stock (I think) but after this MidWest winter it quits after the exhaust pipe. <img src="/forums/images/graemlins/lol.gif" alt="" /> No noticeable difference in anything though.

It is crazy. Much below 800 and that thing bounces around the engine bay like she is missing. 950 and she purrs to the point I think I could use your egg on the valve cover.

I too am curious <img src="/forums/images/graemlins/wink.gif" alt="" />

>>>*Running the idle too high on the efi seems to be difficult, but they seem to do fine in the 850 range. I get reports of surging and speeding up/slowing down when set way too high.

We haven't had to set one over 850 yet for the locals, least that I know of.

The carb engines don't care, I don't think. I suppose if set too high she might tend to diesel, about it.

Shouldn't hurt anything though...*EB

After adding a new tps and tuning the engine. I can get it to idle @ 875 anything lower and it runs terrible in gear.

I wonder if this article might be of any help to you:

Degreeing the cam

Sorry to hijack this thread a little bit, but I have been following it quite closely.
I want to purchase the cam that you bought, but cannot get my stock engine to idle correctly when placed in gear (also an automatic 22RE). The engine is stock, but the exhaust has a header and 2.25" exhaust with high flow muffler and no cat.
The engine purrs like a kitten when sitting there in park (800 rpm), but as soon as I put it into gear, she starts to shake and idle rough. I have even had it stall when stopping at lights.
I hope somebody figures out why the idle fluctuates on an auto when put into gear, cause I really want to know.
My Runner is not my daily driver, so I haven't been pushed as hard to solve the problem on my own, that, and I just have no free time <img src="/forums/images/graemlins/frown.gif" alt="" />.
Good luck, and I hope you find and post a solution <img src="/forums/images/graemlins/cheers.gif" alt="" />

Tye

Hmmm...this is food for thought. I can indeed go down that low, but as soon as I turn on my fan, headlights, brakelights, stereo...she starts to sputter at the stoplights. I just figured it was do to the alternator pulling so hard so I bumped up the idle so I do no have to worry about it.

Now when I pull up to a stoplight she can go down to 800-850 instead of 700-750. This also keeps my oil pressure a little highter (not that I am really worried about that as I have good pressure at idle).

T