Hey guys i found a 99 Tacoma with a 3.4L w/ Auto trans. but i have a 1990 4Runner 3.0L w/ R150F

A buddy and I are trying to find how to convert my harness to accept the R150F and if the 99 Taco ECU will respond to the manual.


We are finding info on what clutch components Iwill need, but no info on how to convert an auto harness to manual.




Any help will be greatly appreciated!
-Mike

 

Anyone?

 

Parts you will need:

- 3.4 flywheel, clutch, pilot bearing.
- 3.0 throwout bearing.

As for the 3.4 auto ECU running with a manual, I'm not sure how that will work. I think if you fooled it into thinking it was in neutral, that might work. I believe I read that somewhere, but don't quote me.

 

Thank you.

I feel it is a good deal. The guy wants 800 for everything i need minus the cats.
The motor has 130,000 on it but it is still in the truck so i can hear it.

He told me he could get me a mt ecu if i want one, so would that be something worth doing or should i try to make the AUTO ECU work?

 

The wiring harnesses won't match. Auto and manuals use different plugs, so you'd have to get the wiring harness to go with the manual ECU.

 

Yea? Okay ill see what the guy says when i talk to him.

 

Really? So the auto harness with the manual trans ecu that is in my truck right now and has been my daily driver for over a year with no codes wont work?? Don't tell my truck that, it might die

I hate it when people say stuff like this, that have absolutely zero experience with this type of stuff. I am not trying to pick on you rob, your a good guy, but that kind of stuff just gets under my skin and many other people on this and other boards have said the same thing.

Now, dont think that all auto harness will plug into manual ecu's, not all of them will. Most will, they had the different plugs mainly in the earlier years between auto and manual trans. That harness out of a 99 taco should be ok, but you need to get the p/n's off of the harness and the ecu and take them to your local yota dealer to make certain of what year they are. Then bury your head into the wiring diagrams for both trucks (the ecu and harness) and make sure every pin is in the same location between the two and that the plugs are the same.

Either way get the manual ecu, if that does not work with your harness, they go for decent money on ebay for guys like me piecing together a 5vz swap instead of buying another truck just for the motor. To answer your question it would be much better if you got the manual ecu to work on your truck. I was thinking like you on making an auto ecu work, but I am not sure if the ecu would throw codes when it starts seeing such a great load on the motor when it thinks the trans is in park (or neutral) That and I wasnt sure if it has a different timing map for the ignition when its in park vs. drive.

From the diagram that I am looking at, 99 taco ecu plugs are the same from manual trans to auto trans. Dont quote me on this, do some research and make sure for yourself and make sure of the year on both parts so that you know for sure what you are working with.

 

Okay THANK YOU VERY MUCH FOR THAT REPLY.

yes i was somewhat yelling in my head. lol


so i think im going to go through with trying to get this motor if it looks okay when we check it out...

So i should look for an ecu with the same style plugs for the auto harness? If not then i will just need a manual ecu and harness.

 

Huh??

What I was saying in the last post was 99 tacos use the same plugs for auto/manual ecu's. If you have the 99 taco auto harness, use a 99 taco manual ecu with the auto harness. You may even be able to go one or two years up or down, just do some research. A manual ecu and harness would work, but its just that much more you don't have to spend if you use the auto harness. The biggest difference is the transmission ends, you will need to clip the ends (with a good section of wire) off of your 3vz harness so that you will have reverse lights and a 4x4 light on your dash.

 

Okay i understand now.

The motor comes with an auto harness/ecu. So i will look for a MT ecu.
I appreciate your help to clarify things for me.

 

I didn't read all of the thread but I just wanted to point out that 95.5 - 97 Tacomas and 4Runners have different plugs for Auto and Manual ECU's.

I know for a fact that 98 4Runner plugs are the same and the Wiring Harness will interchange with the same year auto and manual ECU's.

 

Okay....

So this would be a 99 tacoma. Jason said also that most tacomas use the same ecu connections, at least the 99's.

I will check it out when i get it, but for the price i don't know if i can beat the motor...

 

I added that because I know those things to be fact and wanted it to be posted for when people search. I figured it was good to have in here since it was brought up in this thread. Toyota changed stuff from year to year so that's why it's important to know the year motor you have.

GL with your swap.

If your getting everything and know for sure the motor runs then I think the price you're looking to spend isn't bad.

 

Well the motor is in the truck still i am planning on going and making sure it runs good and doing a compression test hopefuly this weekend..

And i agree, thanks for includeing it in the thread, i hope later i can verify with my findings if it is the same.

 

I will take responsibility for stating that auto and manual ECUs have different plugs. I was not aware of the switch starting in '98 to similar style plugs.

I also take exception to you saying that I have absolutely zero experience with this type of stuff when I did my swap before you did yours. My experience is with a '97 Tacoma engine and it has two different styles of plugs.

Anyhow, thanks for setting things straight for 904's swap.

 

A lot of rumors started a long time ago and no one every really stopped them before they got out of hand. This happens with a lot of off-road stuff.

One example being the rumor that Auto 3.4's don't have a pilot bearing hole. ORS even told people that for a long time.

 

Okay so i got my motor.

came from a 99 tacoma, 4wd, auto trans.

I got everything i could.

So im trying to figure out what i can use from my 3.0 and what i will need to buy.
Can i use my 3.0 flywheel/clutch assembly?
Can i use my 3.0 oil pan.. Ive hear a few people use it over the swap and have had no problems even with a sas.

Also anyone have a ecu that will work instead of my 99 tacoma auto ecu...
How should i find out which one i need. Will any 99 tacoma M/T ecu work with my harness? Or if i post teh part number can anyone tell me wich one they used?

 

Far as I know you could use all your 3.0 clutch stuff, however it's a smaller diameter friction plate, I think. And the oil pan is a go, as long as it's not interfering with the current setup, it'll clear with the 3.4 too.

The rest I dunno, sorry.

 

Well thank you for straightening that out for me..

Appreciate it!

 

I have to search but I thought I heard of people running an auto ecu with a manual set up. They just jumper a trans connection to make the it think it is in neutral. The only question with that set up would be reverse lights. Since I havent messed with or looked into a manual set up I would think that they would still work. Also Im not sure of it having codes. I think I might have seen this set up over at pirate