yotaman's 2nd Gen 3.4 swap!

yotaman · 04-25-2007, 10:37 PM

I'm swapping a 3.4 into my 1995 5 Speed (Manual) 4Runner to replace the blown 200,000 mile + 3.0 engine it had in it.

The 3.4 engine I'm using is out of a 1997 5 speed 4Runner and has around 80,000 miles on it.

I will not be using any parts from Off-road Solution. They offer quality parts to people that don't have the time or want to find the stuff are the parts store. I'm a cheap bastard and have a AutoZone within walking distance of my house so I'll be using parts you can find from there.

My plan is to try and document this swap for other people out there that are interested in doing this on a budget. I'll try and keep a total cost break down and a parts used list for you guys.

I plan to do the wiring myself. Splicing wires using 2 Toyota wiring manuals is not that hard and will save a lot of $$$.

Motor is in the truck and bolted to the transmission.

Here's some pictures for you guys.

Marc P · 04-25-2007, 10:41 PM

That will be a sweet setup!! I will be keeping a very close eye on this one.

**Elvota** · 04-25-2007, 10:43 PM

I am in...

Trying to get my 3.4 swap up and going. I'd like to try the wiring myself as well.

Elton · 04-25-2007, 10:45 PM

should be sweet when its done i did the 3.4L swap of course it came with a new 4runner

yotaman · 04-25-2007, 10:57 PM

Quote:

Originally Posted by Elton

should be sweet when its done i did the 3.4L swap of course it came with a new 4runner

Yeah it should be a lot of fun. Best of both worlds when you do a 3.4 swap.

I've never been much of a 3rd Gen fan. I'm a pure 2nd Gen fan at heart. Plus my 2nd Gens say "Made in Japan". The way I like it.

914runner · 04-26-2007, 12:41 AM

Good luck with your swap. The result is awesome!

yotaman · 04-27-2007, 08:04 PM

Got some more work done today. Cleaned the engine bay and got all the 3.0 stuff out, plus I got the 3.0 wiring harness out.

It was a pain to get the blower and ac stuff out so I could work with the wiring harness easier.

3.0 Wiring harness out of the truck and on the ground.

Houston I think we have a problem. The 3.4 wiring harness I have is out of a 97 5 speed 4Runner.

This is a 3.4 ECU for a 3.4 5 Speed out of a different truck. The plugs don't match.

From what I've found there are 2 types of wiring harness's for 3.4 motors. There is a 5 Speed (Manual) and an Automatic on. I've now found out that I have a Automatic Wiring Harness and a Manual ECU.
Let the good times roll.

dill883 · 04-27-2007, 08:16 PM

That sucks, hey sorry about the early pm about the cost and the questions about it, wasent paying attention to when you posted, deffenly intersted good luck brotha keep us posted

yotaman · 04-29-2007, 12:52 PM

I've been doing a lot of research today.

1. There are TWO types of plugs for the 3.4. There are Manual plugs and there are Auto plugs. Here's a picture showing the difference.

Manuel Plugs on top. Automatic Plugs on bottom.

My problem now is I have an Automatic wiring harness and need to figure out how to make my Manual ECU work with it.

2. Some people might have heard the rumor that Automatic equipped 3.4 vehicles do not have the pilot bearing hole in the crank shaft. I have a 14 year veteran (Master) Toyota mechanic friend that says 100% that rumor is FALSE. He says it would be stupid for Toyota to have 2 different cranks made. That is not how Toyota does things.

But the crank is not your problem if you want to use a Manual Transmission behind an Automatic 3.4. You either have to swap wiring harness's or plugs.

paulyota · 04-29-2007, 01:05 PM

Quote:

Originally Posted by yotaman

Got some more work done today. Cleaned the engine bay and got all the 3.0 stuff out, plus I got the 3.0 wiring harness out.

It was a pain to get the blower and ac stuff out so I could work with the wiring harness easier.

3.0 Wiring harness out of the truck and on the ground.

Houston I think we have a problem. The 3.4 wiring harness I have is out of a 97 5 speed 4Runner.

This is a 3.4 ECU for a 3.4 5 Speed out of a different truck. The plugs don't match.

From what I've found (wish I know this before) there are 2 types of 3.4 5Speed wiring harness. The Auto's on have one type. Now I have to figure out how to get the right ECU for my wiring harness.

Let the good times roll.

i am swapping a3.0vz 4runner into a 22r-e and need to figure out the same thing on the plugs for the body harness.

chimmike · 04-29-2007, 01:59 PM

please keep a price list of how much this ran you and the parts you needed.

I'm definitely interested in seeing if I can do this swap without spending $1500 on parts from a kit.

This bolted right to your stock auto tranny?

yotaman · 04-29-2007, 02:05 PM

Quote:

Originally Posted by chimmike

please keep a price list of how much this ran you and the parts you needed.

I'm definitely interested in seeing if I can do this swap without spending $1500 on parts from a kit.

This bolted right to your stock auto tranny?

I'm trying to keep a price list.

I'm bolting this motor to a 5 Speed (Manual) Transmission. The 3.4 I have is from an Automatic 4Runner from what I've found out. The salvage yard said it was from a 5 Speed 4Runner.

**Elvota** · 04-30-2007, 09:40 AM

Nice pic with the plug comparisons. Very helpful.

What does the Auto ECU look for that the 5spd ECU doesn't? I am assuming certain inputs from the auto transmission, and then a return path to the tranny with instructions.

Is it possible to figure out which wires are "talking" to the auto tranny and just eliminate them? If so, couldn't an auto ECU work on a 5spd equipped truck?

I know I am simplifying things a great deal, but seems like such a thing could be possible. Unless the auto ECU uses tranny info to dictate engine management.

I am finding a lot more auto 3.4's in my search for a donor, so if I could use one in my 5spd I'd have lot's of purchase options.

yotaman · 04-30-2007, 10:03 AM

Quote:

Originally Posted by Elvota

Nice pic with the plug comparisons. Very helpful.

What does the Auto ECU look for that the 5spd ECU doesn't? I am assuming certain inputs from the auto transmission, and then a return path to the tranny with instructions.

Is it possible to figure out which wires are "talking" to the auto tranny and just eliminate them? If so, couldn't an auto ECU work on a 5spd equipped truck?

I know I am simplifying things a great deal, but seems like such a thing could be possible. Unless the auto ECU uses tranny info to dictate engine management.

I am finding a lot more auto 3.4's in my search for a donor, so if I could use one in my 5spd I'd have lot's of purchase options.

I'm still doing reaseach to figure out my best route now but as of right now I see 2 options maybe 3.

1. Get a wiring harness out of a 5 Speed (manual) equipped vehicle and use it.

2. The plugs on the old 3.0 wiring harness will plug into the 3.4 5 Speed (manual) ECU so I'm thinking about replacing the plugs on the 3.4 Automatic wiring harness with my old 3.0 wiring harness plugs. I'd sill need to buy one plug, I think it's a 12 wire plug that the 3.4 ECU needs but the 3.0 wiring harness doesn't have.

3. Buy a 3.4 Automatic ECU and jump the neutral wires so the ECU thinks the vehicle is always in neutral.

I've done an Automatic to Manuel swap on my other 1995 4Runner and jumped the neutral wires. The motor didn't seem to run right so I purchased a 3.0 5 Speed ECU and used that. The motor did seem to run better.

My thought is that maybe the ECU needs information from the Automatic to make fuel judgment calls. But then again I have read some people using Automatic ECU with no problems at all.

I'm planning to use option 1.

4rnr · 04-30-2007, 08:41 PM

awesome, im in the middle of doing my 2nd 3.4 swap, but I still dont have it down pat

yotaman · 06-26-2007, 09:21 PM

Been working on the swap. Got all my 3.0 body wires identified and labeled. 10 wires from the body is all I found that I needed. I'll post pictures and more information latter.

yotaman · 06-27-2007, 12:28 AM

Does anyone know if there is a way to identify what year a 3.4 is and it's wiring harness.

I was told I purchased a 3.4 and wiring harness out of a 1997 Manual 4Runner but have sense found the wiring harness is not a Manual one and is an Automatic.

My problem is I can not find a FSM that matches my wiring harness. I've went through just about every FSM on techinfo.toyota.com

I've called a couple of Toyota Dealers and they all say there's no way to identify a motor or wiring harness. Is there not a VIN # on the motor somewhere?

I have everything finished for my 3.4 swap but the wiring, as soon as I figure out how to get past this I can drive my new beast.

yotaman · 06-27-2007, 05:14 PM

FYI GUYS: MAKE SURE YOU GET A MOTOR AND WIRING HARNESS FROM A VEHICLE THAT YOU CAN GET THE VIN FOR OR AT LEAST VERIFY THE YEAR AND MAKE.

I'm having major issues finding what motor and wiring harness I have. I'm probably going to end up pulling the motor back out and making a custom wiring harness.

04-25-2007, 10:37 PM	#1 (permalink)
yotaman Registered User Join Date: Mar 2005 Location: Cumming, GA Posts: 1,049	yotaman's 2nd Gen 3.4 swap! I'm swapping a 3.4 into my 1995 5 Speed (Manual) 4Runner to replace the blown 200,000 mile + 3.0 engine it had in it. The 3.4 engine I'm using is out of a 1997 5 speed 4Runner and has around 80,000 miles on it. I will not be using any parts from Off-road Solution. They offer quality parts to people that don't have the time or want to find the stuff are the parts store. I'm a cheap bastard and have a AutoZone within walking distance of my house so I'll be using parts you can find from there. My plan is to try and document this swap for other people out there that are interested in doing this on a budget. I'll try and keep a total cost break down and a parts used list for you guys. I plan to do the wiring myself. Splicing wires using 2 Toyota wiring manuals is not that hard and will save a lot of $$$. Motor is in the truck and bolted to the transmission. Here's some pictures for you guys. __________________ Greg - http://www.pureyota.com --- you can't fail if you don't give up. Proud dad of a little girl.. 1. 1997 Tacoma - 3.4 auto - SAS'd - DD 2. 1995 4Runner - SAS'd - FJ62 Front - FZJ80 Rear, 40" Iroks - Beater! 3. 1995 4Runner - 3.4 swapped - Baby mobile/Grocery getter! You can lose a lot of money chasing women, but you'll never lose women chasing money. Last edited by yotaman : 04-29-2007 at 02:06 PM.

04-25-2007, 10:41 PM	#2 (permalink)
Marc P Contributing Member Join Date: Oct 2002 Location: Santee, CA Posts: 2,745	That will be a sweet setup!! I will be keeping a very close eye on this one. __________________ 1995 4Runner---SAS with goodies

04-25-2007, 10:43 PM	#3 (permalink)
Elvota Super Moderator Staff Join Date: Jun 2005 Location: Phx, AZ Posts: 3,442	I am in... Trying to get my 3.4 swap up and going. I'd like to try the wiring myself as well. __________________ ================ 1990 4Runner \| V6 3.4 \| 5spd \| 240 someoddthousand miles \| SR5 \| SAS \| RLS \| 35's \| ARB \| TJM \| 217 to 1 \| W8000 - four wheels \| three sticks \| two hands \| one trail - RIGITY DIGITY

04-25-2007, 10:45 PM	#4 (permalink)
Elton Contributing Member Join Date: Jul 2005 Location: Toledo,Oregon Posts: 9,079	should be sweet when its done i did the 3.4L swap of course it came with a new 4runner __________________ My Truck 98 4runner SR5 3.4L 5spd 4x4 E-Locker Mods Mom 07 Tundra d-cab limited 5.7L 4x4 auto mom 92 pickup SR5 X-cab 3.0L 5spd 4x4 Papa 89 Pickup SR5 X-cab 4x4 3.0L 5spd/98 4runner SR5 4x4 auto 3.4L R.I.P 91 4runner SR5 4x4 3.0L 5spd Totaled 5/13/06 My Wreck

04-26-2007, 12:41 AM	#6 (permalink)
914runner Contributing Member Join Date: Oct 2002 Location: Tigard, Oregon Posts: 2,082	Good luck with your swap. The result is awesome! __________________ 1997 Toyota 4Runner, 3.4L (5VZ-FE), 5-Speed (R150F), 4WD, 4.10's, 33's 1998 Toyota 4Runner, 3.4L (5VZ-FE), 5-Speed (R150F), 4WD, 4.10's, 33's 1991 Toyota 4Runner 4 Door, 3.4l (5VZ-FE), 5-Speed (R150F), 4WD, 32's, 4.10's

04-27-2007, 08:04 PM	#7 (permalink)
yotaman Registered User Join Date: Mar 2005 Location: Cumming, GA Posts: 1,049	Got some more work done today. Cleaned the engine bay and got all the 3.0 stuff out, plus I got the 3.0 wiring harness out. It was a pain to get the blower and ac stuff out so I could work with the wiring harness easier. 3.0 Wiring harness out of the truck and on the ground. Houston I think we have a problem. The 3.4 wiring harness I have is out of a 97 5 speed 4Runner. This is a 3.4 ECU for a 3.4 5 Speed out of a different truck. The plugs don't match. From what I've found there are 2 types of wiring harness's for 3.4 motors. There is a 5 Speed (Manual) and an Automatic on. I've now found out that I have a Automatic Wiring Harness and a Manual ECU. Let the good times roll. __________________ Greg - http://www.pureyota.com --- you can't fail if you don't give up. Proud dad of a little girl.. 1. 1997 Tacoma - 3.4 auto - SAS'd - DD 2. 1995 4Runner - SAS'd - FJ62 Front - FZJ80 Rear, 40" Iroks - Beater! 3. 1995 4Runner - 3.4 swapped - Baby mobile/Grocery getter! You can lose a lot of money chasing women, but you'll never lose women chasing money. Last edited by yotaman : 04-29-2007 at 02:11 PM.

04-27-2007, 08:16 PM	#8 (permalink)
dill883 Registered User Join Date: Nov 2005 Location: Bellevue, WA Posts: 24	That sucks, hey sorry about the early pm about the cost and the questions about it, wasent paying attention to when you posted, deffenly intersted good luck brotha keep us posted

04-29-2007, 12:52 PM	#9 (permalink)
yotaman Registered User Join Date: Mar 2005 Location: Cumming, GA Posts: 1,049	I've been doing a lot of research today. 1. There are TWO types of plugs for the 3.4. There are Manual plugs and there are Auto plugs. Here's a picture showing the difference. Manuel Plugs on top. Automatic Plugs on bottom. My problem now is I have an Automatic wiring harness and need to figure out how to make my Manual ECU work with it. 2. Some people might have heard the rumor that Automatic equipped 3.4 vehicles do not have the pilot bearing hole in the crank shaft. I have a 14 year veteran (Master) Toyota mechanic friend that says 100% that rumor is FALSE. He says it would be stupid for Toyota to have 2 different cranks made. That is not how Toyota does things. But the crank is not your problem if you want to use a Manual Transmission behind an Automatic 3.4. You either have to swap wiring harness's or plugs. __________________ Greg - http://www.pureyota.com --- you can't fail if you don't give up. Proud dad of a little girl.. 1. 1997 Tacoma - 3.4 auto - SAS'd - DD 2. 1995 4Runner - SAS'd - FJ62 Front - FZJ80 Rear, 40" Iroks - Beater! 3. 1995 4Runner - 3.4 swapped - Baby mobile/Grocery getter! You can lose a lot of money chasing women, but you'll never lose women chasing money. Last edited by yotaman : 04-29-2007 at 02:12 PM.

04-29-2007, 01:59 PM	#11 (permalink)
chimmike Contributing Member Join Date: Jan 2007 Location: SRQ, FL Posts: 1,539	please keep a price list of how much this ran you and the parts you needed. I'm definitely interested in seeing if I can do this swap without spending $1500 on parts from a kit. This bolted right to your stock auto tranny? __________________ '03 350z Turbocharged (totalled :( ) '04 Honda Accord LX V6 (first bone stock car I've owned in a while) 94 4runner SR5 4x4, 31x10.5's, SAS, Warn M8000 winch, Allpro bumper, Summit (K&N FIPK in different wrapping) CAI, flowmaster muff, 5.29's FOR SALE! '07 Harley-Davidson XL1200c, rush slip-ons

04-30-2007, 09:40 AM	#13 (permalink)
Elvota Super Moderator Staff Join Date: Jun 2005 Location: Phx, AZ Posts: 3,442	Nice pic with the plug comparisons. Very helpful. What does the Auto ECU look for that the 5spd ECU doesn't? I am assuming certain inputs from the auto transmission, and then a return path to the tranny with instructions. Is it possible to figure out which wires are "talking" to the auto tranny and just eliminate them? If so, couldn't an auto ECU work on a 5spd equipped truck? I know I am simplifying things a great deal, but seems like such a thing could be possible. Unless the auto ECU uses tranny info to dictate engine management. I am finding a lot more auto 3.4's in my search for a donor, so if I could use one in my 5spd I'd have lot's of purchase options. __________________ ================ 1990 4Runner \| V6 3.4 \| 5spd \| 240 someoddthousand miles \| SR5 \| SAS \| RLS \| 35's \| ARB \| TJM \| 217 to 1 \| W8000 - four wheels \| three sticks \| two hands \| one trail - RIGITY DIGITY

04-30-2007, 08:41 PM	#15 (permalink)
4rnr Registered User Join Date: Sep 2004 Location: Plainfield, IL Posts: 1,175	awesome, im in the middle of doing my 2nd 3.4 swap, but I still dont have it down pat __________________ poop 1988 stock 4runner, v6, 5spd, soft top. 1990 fj62 stock and mint! 1992 4runner, 3.4, auto, SAS'ed, Marlin USA springs (4"/5"), 37" PBR's, 30 spline Longfields, Hydro assist, dual inchworms (5:1, twin stick, 23 spline, chromo output, 10* clock) 5.29's, lockrite's, custom exo, custom snorkle, High angle drivelines drive shafts, 108" wheelbase, Warn hs9500i, Electronic shifters by AWshifting, Mcintosh/Dynaudio a/v system. The build up...http://www.yotatech.com/showthread.php?t=74915

06-26-2007, 09:21 PM	#16 (permalink)
yotaman Registered User Join Date: Mar 2005 Location: Cumming, GA Posts: 1,049	Been working on the swap. Got all my 3.0 body wires identified and labeled. 10 wires from the body is all I found that I needed. I'll post pictures and more information latter. __________________ Greg - http://www.pureyota.com --- you can't fail if you don't give up. Proud dad of a little girl.. 1. 1997 Tacoma - 3.4 auto - SAS'd - DD 2. 1995 4Runner - SAS'd - FJ62 Front - FZJ80 Rear, 40" Iroks - Beater! 3. 1995 4Runner - 3.4 swapped - Baby mobile/Grocery getter! You can lose a lot of money chasing women, but you'll never lose women chasing money.

06-27-2007, 12:28 AM	#17 (permalink)
yotaman Registered User Join Date: Mar 2005 Location: Cumming, GA Posts: 1,049	Does anyone know if there is a way to identify what year a 3.4 is and it's wiring harness. I was told I purchased a 3.4 and wiring harness out of a 1997 Manual 4Runner but have sense found the wiring harness is not a Manual one and is an Automatic. My problem is I can not find a FSM that matches my wiring harness. I've went through just about every FSM on techinfo.toyota.com I've called a couple of Toyota Dealers and they all say there's no way to identify a motor or wiring harness. Is there not a VIN # on the motor somewhere? I have everything finished for my 3.4 swap but the wiring, as soon as I figure out how to get past this I can drive my new beast. __________________ Greg - http://www.pureyota.com --- you can't fail if you don't give up. Proud dad of a little girl.. 1. 1997 Tacoma - 3.4 auto - SAS'd - DD 2. 1995 4Runner - SAS'd - FJ62 Front - FZJ80 Rear, 40" Iroks - Beater! 3. 1995 4Runner - 3.4 swapped - Baby mobile/Grocery getter! You can lose a lot of money chasing women, but you'll never lose women chasing money.

06-27-2007, 05:14 PM	#18 (permalink)
yotaman Registered User Join Date: Mar 2005 Location: Cumming, GA Posts: 1,049	FYI GUYS: MAKE SURE YOU GET A MOTOR AND WIRING HARNESS FROM A VEHICLE THAT YOU CAN GET THE VIN FOR OR AT LEAST VERIFY THE YEAR AND MAKE. I'm having major issues finding what motor and wiring harness I have. I'm probably going to end up pulling the motor back out and making a custom wiring harness.