viesail

Got a 22rte that has been swapped to 22re. All put back together, but injectors aren't firing.

Got fuel pressure, spark, and compression. Resistor is good and there's power to injectors. Cut open harness to check splice points for injector grounds from ECU. They were rough looking so I cut and redid.

The complete EFI setup I bought came with an ECU stamped "22R" I assumed they were interchangeable cause this was pulled from a 22RE. Now I'm wondering cause I can't figure out what the problem is with the injectors.

I also have a 22RTE ECU that I've plugged in for the hell of it. Still no injector fire. Is there a difference in the 22R/22RE ECU that would cause this problem, or is there still something I might be missing elsewhere.

Btw, I'm getting code 7 and 11, but I understand that TPS would not cause ECU to not ground the injectors, or prevent start up.

Thanks!

Robert m

iTrader: (2)

I would start by getting the correct ECU harness and engine that you you have installed in the truck. I very much doubt the 22r ECU has a whole lot of fuel injection programing in it.

viesail

I emailed the seller of the EFI parts I bought. He assures me that this ECU stamped 22R was used in his 22RE truck, and it ran fine.

viesail

Also, the part number on my "22R" ECU is the same on a "22RE". I have the "22RTE" ECU that came with my truck and it has a different part number. But 22R and 22RE are the same. How can they be different parts, but have the same part number?

wyoming9

iTrader: (1)

It is a Toyota Thing

What is worse is having 3 parts the same from 3 different vehicles all having different part numbers.

You removed the turbo manifold and related parts.

Are the newer parts off an engine past 88 that has the different impedance injectors?? They won`t need the solenoid resistor (injector resistor)

Quite a few run into this problem.

viesail

So when I bought the truck off a fella in upstate SC, he had a new block/head and was running a Carb'd setup. He didn't know what happened to the 22RTE as he bought it wrecked I guess. The only thing present from the turbo setup was the ECU, wiring harness, gas tank w/ pump and some charcoal canisters. I should also mention that it was also originally A/T. PO did the swap to M/T along with the 22R conversion.

I found all of the EFI parts in a complete kit out of an 87 M/T truck.

viesail

I will pay an expert $25 on PayPal for a definitive answer on this "same part number" "22R vs 22RE" ECU compatibility matter. Can't get my injectors to pulse with test light. Don't know where else to look.

Terrys87

iTrader: (1)

I think this come out of an automatic truck but will not swear to it. I bought it off of a local guy to me and he threw it in with some other things I bought. Not sure if this will help. I cant read the first few numbers but it is xxxx1-35050 You can see the label does say 22R-T


I have never tried the https://www.yotatech.com/forums/f116...t-22re-270857/ on pins 10 and 20 on the ECU. I wonder if you could use it there and see if you are getting a signal from the ECU? Pinout diagram>>> http://i203.photobucket.com/albums/a...outdiagram.jpg

Here is the harness that come out of the turbo truck. Last number was cut off when the PO cut the harness out 82131-8937x

viesail

Here's my ECU

Terrys87

iTrader: (1)

That looks to be the same exact ECU I have in my base model 86 Runner. The part number is 89661-35070.



I dont know much about the turbo trucks but I did help a friend with his one time just in case you run into the same issue he did. His turbo would kick out after higher rpms. Several things were checked out and finally he found a thread on some Toyota web site that showed how to disconnect two resistors in the ECU. Basically removing the Rev Limiting on it. I have tried to find that site he found and neither have been able to find it again. Just wanted to pass that on to you if you later on run into that.

Terrys87

iTrader: (1)

To find the harness part number on your truck or the parts truck, it is located just above the Steering Clolumn. You will need to remove the bezel and speedometer assembly to see it. https://www.yotatech.com/forums/f199...l#post51861864 You wont need to go as far down as I have showed in the link but so you will know where it is at.

On Post #664 https://www.yotatech.com/forums/f199...l#post51897320 will be some more info that might help you on the non firing injectors. As far as difference in turbo and non turbo I am not much help on that.

viesail

Terrys87 I really appreciate you searching for this info for me, but unfortunately the only thing I'm trying to determine at this point is whether or not an 87 ECU part number "89661-35070" stamped "22R" will work in an 87 22RE taking into account that an 87 ECU stamped "22RE" has the same part number of "89661-35070". There is no info out there on an ECU for a Carb'd/22R. So why does this ECU I have exist?

Terrys87

iTrader: (1)

I dont know if it would make a difference but it might. To get the diagnostics of of an 85/86 you jumper a round plug. 87 and newer it is in the Diagnostic box. Is this different inside the ECU? I dont know. I have worked on several 84-88 trucks and the changes that Toyota does is amazing. Some of it doesnt make sense what they do and I have run into several other issues due to that.

It would only be a guess for me but I would say there is some difference in the 86 and 87 ECU. If the part numbers are the same then I would think they would interchange.

On the ECU for a carb truck I did run into a similar situation on that as well. I would think carbed trucks would not have an ECU. I converted a California Emissions carb truck to EFI and the Califronia Emissions truck did have an ECU in it.

Copied just to show difference in ECU possibilties.
How to get Check Engine Codes. I just put this up for others. Applies to 87 and up. 86 and older is the bottom picture.


The Diagnostic port for the 85-86 is on the Drivers side inner fender and is nothing the same as the 87 and up. Here is T1 and E1 jumped. The codes and engine flashes are the same as the rest of the trucks on the dash.

wyoming9

iTrader: (1)

Good clean ground on the intake manifold??

A poor ground will stop the injectors from firing.

One engine I had to run that ground into the battery .

Was the fuel pressure cut back to deliver the very low pressure to the carb??

Poor connection or bent pin at the ECU??

Just some ideas

viesail

All 4 ground positions around engine bay are looking good.

PO never hooked up the fuel lines for his carb mod, was just feeding the carb from a bottle till he could source a tank w/o internal fuel pump. I bought it before he could make that transition, so the fuel system is unaltered. I did drop the take and clean it up and check that fuel pressure was good, plus new filter.

ECU pins look great. Harness also looks good.

wyoming9

iTrader: (1)

This is the ground for the ECU this is very critical if it has a poor connection all kinds of problems.

It should be 3 brown wires

How you are doing this without the EWD`s for the different years has to be very frustrating.

viesail

My 4Runner is an 87, and the donor EFI is from an 87 truck. It hasn't been confusing assembling. Only confusing as to why the injectors won't fire.

I also have the FSM for 1987.

grumpin

Looking at the wiring diagrams, the injectors get their ground through the ECU. I'm assuming the carb models use the Emission Control Computer. I would think a 22R computer would not work, because no ground for the injectors. But, I have never dealt with this before. I would try to find the injector grounds, White wire and White and Red wire and jumper them to ground and see if it works. If it does I would think you would need an EFI ECU. I have the Electrical Wiring Diagram manual also and the only difference I see is the turbo does not use the White wire, just White and Red. And as Wyo9 said make sure the ground for the ECU, the 3 brown wires is good.

osv

are you sure that the donor efi ecu came out of a m/t vehicle? you can use it if it came out of an a/t vehicle, but you have to hook the shifter wires together.

here is a thread on ecu part numbers, with a yotatech chart on the last page :-)

http://www.pirate4x4.com/forum/toyot...atibility.html

my '86 22re ecu says 22r on it, fwiw, and i run a manual trans.

grumpin

osv, that's good info on the ECU (labeled 22R). I was going to look at mine but hadn't had a chance.