stratejacketbillybob

I am in process of replacing all 4 connectors in my 1989 4runner with a 22re. I, being a bit under the influence at the time, forgot to mark where each one goes to each fuel injector. Any help would be greatly appreciated.

millball

I don't think it really matters, as long as they lay out and reach properly.

I believe that the 22RE injectors batch fire, they do not fire sequentially, so which injector wire goes where is not critical.

wallytoo

iTrader: (1)

it does not matter in the least. you can connect them to any injector, in any order. all four injectors fire at the same time, as noted above.

L5wolvesf

Wire up the injectors as mentioned, and make sure the truck runs . . . BEFORE having the beer.

stratejacketbillybob

Thanks for the help.

scope103

All correct. http://www.cygnusx1.net/Media/Supra/...taTech/h22.pdf (page 15)

wallytoo

iTrader: (1)

nice document. i noticed on page 3 the statement "passing fuel through the pump motor aids in cooling and lubrication", something i have claimed for quite a few years. the tank can be run to nearly empty without causing damage to the pump, period. it IS cooled by the fuel passing through it, not by being fully immersed in gas ( as in a tank that is more than 1/3 full). i had my own proof/confirmation of this with my legacy wagon, which i owned for 15 years and put 250k miles on, and nearly always ran the tank down until the low-fuel light came on. and the legacy has two pumps in the tank, because the tank straddles the rear driveshaft.

mattyboi

Kind of off topic... But I was surprised to learn that early EFI's did the whole "batch firing" thing. Are there any mods/ECU upgrades that can be done to get the injectors to fire sequentially?

scope103

Uh, why?

I suppose, in the abstract, sequential firing is "better" because it would be more in sync with the intake valve. But everything affects everything else, so I would think you would also need to update the intake valves, the plenum, and the position of the injectors in the plenum. Maybe the injectors, too.

I get the sense that at one time in distant automotive history, power plant engineering was so primitive that it was possible to replace a carburetor or cam shaft or head gasket and get a sudden 30Hp "for free." But those days were long gone by the time your truck was designed. I'm not aware of any "mod" that will increase Hp or mileage enough to cover the price of the parts. (Yes, that means you K&N.) If you want a "modern" power plant, you need to get your hands on a modern Toyota.

But if you want to give it a try, and then put the truck on a dynamometer, I'm looking forward to seeing the results!

mattyboi

Just out of curiosity haha But looks like it's probably easier to just throw in a newer engine. Love the 22re but just wish it was a bit more fuel efficient for it's lack of power lol