Author Topic: how hard is a 3.4 swap (Read 5581 times)

YotaTodd · « **on:** Dec 01, 2010, 09:33:51 AM »

I found a 90's 4 runner for $500 and i think it has a 3.4 i was wondering how hard it would be to do a motor swap. What would i have to do?

bigarms23 · « **Reply #1 on:** Dec 01, 2010, 06:22:53 PM »

it will be easier to find a donor 3.4 truck or 4runner and swap it in the 4runner so the not that difficult

zippo · « **Reply #2 on:** Dec 01, 2010, 10:18:28 PM »

http://www.offroadsolutions.com/products.html

they closed but keep the site up TONS of info for a 3.0 to 3.4 swap

COToy91 · « **Reply #3 on:** Dec 01, 2010, 10:40:59 PM »

this forum will be your bible
http://www.yotatech.com/f160/

It is one of the easiest swaps I have done. Just takes time

YotaTodd · « **Reply #4 on:** Dec 02, 2010, 08:13:39 AM »

sorry im going to swap into a first gen truck

yota4x4sc · « **Reply #5 on:** Dec 02, 2010, 11:11:32 AM »

its pretty basic..i done 2 before.. just swap out the oil pans to t100 if u sas it..they bolt right in with the 3.0 motor mounts

87hillbillyoter · « **Reply #6 on:** Dec 02, 2010, 12:02:01 PM »

i also want to do this. yotatech has a great section on 3.4 swaps

YotaTodd · « **Reply #7 on:** Dec 02, 2010, 12:42:54 PM »

i found out today its a 97 4 runner but not shere witch motor it has, does any one know. do i need the t100 oil pan cuz my 82 already has a frunt axle.

COToy91 · « **Reply #8 on:** Dec 02, 2010, 01:04:22 PM »

Quote from: YotaTodd on Dec 02, 2010, 12:42:54 PM

i found out today its a 97 4 runner but not shere witch motor it has, does any one know. do i need the t100 oil pan cuz my 82 already has a frunt axle.

97 will have a 3.4 5vzfe in it. You will need the 2wd t100 oil pan

YotaTodd · « **Reply #9 on:** Dec 02, 2010, 03:58:09 PM »

thanks and how about the motor mounts

COToy91 · « **Reply #10 on:** Dec 02, 2010, 06:12:03 PM »

use 3.0 3vz mounts if you are putting it in a vehicle that had a 3.o originally. If you are fabbing up your own frame side mounts, I would still use the 3.0 ones because they are shorter.

Dingman. · « **Reply #11 on:** Dec 03, 2010, 12:33:46 AM »

I got away with no problem using my 3.0l oil pan also..

COToy91 · « **Reply #12 on:** Dec 03, 2010, 09:34:12 AM »

Yeah most people say if the solid axle cleared the pan before it will again

YotaTodd · « **Reply #13 on:** Dec 06, 2010, 08:41:43 AM »

do the 97 4 runners have a security system that stops the ignition.

COToy91 · « **Reply #14 on:** Dec 06, 2010, 09:35:30 AM »

Quote from: YotaTodd on Dec 06, 2010, 08:41:43 AM

do the 97 4 runners have a security system that stops the ignition.

nope, that came in 2002 ish. I used a 97 harness and computer to run my 2001 motor, so if you buy a late model enigine you can always do that, unless you live in Cali

YotaTodd · « **Reply #15 on:** Dec 06, 2010, 12:06:38 PM »

well i live in cali. but were i live u only need to smog once. the problem I'm having now is i cant start the truck. every thing has power but wen i turn the key the starter doesn't do anything it doesn't even make a sound like its not getting a signal. the battery is good and i herd the fuel pump turn on.

Dingman. · « **Reply #16 on:** Dec 06, 2010, 08:48:12 PM »

Did you run a wire from the starter relay to the starter solenoid?

YotaTodd · « **Reply #17 on:** Dec 07, 2010, 08:01:13 AM »

no thats what im going to do next

YotaTodd · « **Reply #18 on:** Apr 22, 2011, 10:52:14 AM »

were can i get a plug in wiring harness i have the computer

dntsdad · « **Reply #19 on:** Apr 23, 2011, 10:52:21 AM »

I think that I am a little confused on your issue but here it goes. If this isnt your problem, its only 15 minutes of my life.

There is no provision for the starter trigger wire on the 3.0 harness like there is on the 3.0. The solution is that you have to run your own wire to engage the starter.

Off the starter itself, the large wire goes directly to your battery of course.

The smaller one needs to run into your kickpanel where all the other wires go. I ran my own wire in there by making a small hole in the 3.4 loom going through the firewall.

In there, in one of the stock 3.0 plugs, there is a large black/white wire that is the starter trigger wire for the 3.0. Verify with a multimeter, but I think its the only black/white wire there. This is downstream of all the clutch override system so there is no need to mess with any of that.

The wire from your starter needs to get wired together with this black/white wire in the kickpanel ALONG with another wire leading TO the STA pin out of the ECM so the ECM knows that you are cranking the motor.

MAD Photoshop drawing skills below.

***EDIT***Just realized how old this was. Oh well.......I'll leave it for future searchers.
http://www.toyonlyswaps.com/ makes conversion harnesses, flipped crossover pipes, etc.

YotaTodd · « **Reply #20 on:** Apr 28, 2011, 10:18:41 AM »

thanks for the info I got the starter to work.all I did was use the ignition for the for the 22r and the write plugged right into the 3.4 starter so I avoded all the 3.4 safety stuff.

YotaTodd · « **Reply #21 on:** Apr 28, 2011, 10:26:11 AM »

What I'm trying to do now is find a compleat wiring harness for the 3.4. I was going to try and make the stock harness work but there is way to many wires for me to make sense of.i was hopeing to find someone that had a harness so all I have to do is plug in my computer a ground and power

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