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Old 07-09-2019, 01:00 AM #31
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Quote:
Originally Posted by Geohead View Post
Will an 3.4 directly bolt up to a 1990 4 runner with the A340H automatic transmission or are any special adaptors needed.

It might bolt up, but electronically it's different to my knowledge. A decent headache to figure out. That's why when I did my swap I opted for a manual trans at the same time. Simplified it all. I thought I had read to keep a 3.4 auto swapped in you'd need to use the 3.4's auto trans as well. Which means you might as well just buy a 3rd gen at that point. Probably a good amount of fab work for crossmember, linkage and driveshafts. Whereas the manual from a 2nd gen is a direct replacement and bolts right up. Just need specific clutch components and the hydraulics/pedal brackets to convert.

Totally worth it
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Old 09-16-2019, 03:09 AM #32
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Wondering if anyone might shed some light on wiring for the swap, I've been working 12's all week and then an hour or two of work on my swap, and I know my mind is scattered but what connectors am I to re-pin? I know this will sound dumb, please just a simple response rather than a very universal 3.4 swap thread. I've gotten as far as the E9,E10, and E11 connectors and those came with the engine, the other two wires E12 and E14 need to be re-pinned from what connectors?! Recipient is a 95' 4Runner A/T and donor is a 01' 4Runner A/T, this will mark the 2nd time I've boughten the TIS subscription. I've done 2 engine swaps, but for older ford's, with no electronics like this level. Any help of PM's are much appreciated!
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Old 09-16-2019, 03:38 AM #33
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S.o.s. 3.4l swap wiring

Seeing if any one can send me any form of help/aid in the wiring aspect of the swap, been stuck on it, not a novice on general engine swaps, but never anything the advance. I just need to know what to re-pin and what to do!!

Any help or PM'S work, don't have too much time on a daily basis to put many hours in it, but lose sleep over where I'm going wrong.
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Old 09-16-2019, 11:30 PM #34
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3.0 to 3.4 engine swap

You should be more specific as to which wires you're having trouble with? The engine computer only needs to talk to the body in a few different spots: 12v ignition power, ground(s), maybe a constant 12v power, and then like an output for the check engine light, an input from the speedo for speed reference, an output to the tach (which also needs additional mods to work right) and then if you want to get real fancy the AC amplifier needs to talk to the computer also. Some of the engine sensors from the harness go directly to the body harness as well such as the oil pressure SENSOR (not a switch that the 3.4 comes with, but a SENSOR as found on the 3.0 if it has an actual gauge and not just a dummy light). And if you have ADD for 4wd that passes into the engine harness I believe depending on year.

So, furthermore, which wires are you confused over? The ones that link the computer to the body? That should only be ignition feed and ground at the minimum to at least get it running.

I wanted to add: the only wires you really need to focus on are those that connect to the body (which will be the big ass connectors besides whatever plugs into ECM). Then see which ones come off the engine harness and what they do, and re-pin into stock body harness connector to feed original purpose. Toyota uses codes like IG or CKP for various functions and they are almost always the same for multiple years. So to identify a wires purpose, looks at the lettered code on the diagrams and swap over
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Last edited by 4Reak Show; 09-16-2019 at 11:34 PM.
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Old 09-17-2019, 01:50 AM #35
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Yeah, so the wires left in my 95' 4Runner are the IH1/2 I believe, and wondering if I need to re-pin the to plug into the E12 and E14 plugs on my 5VZ-FE? E9, E10, and E11 all plug directly into my new engine, leaving me with two empty connectors (I went to a local Toyota junkyard and got the E12 and E14 connectors as I am currently led to believe, that I need to re-pin IH1 and IH2 into E12 and E14). Just need some form of validation, if I am correct to re-pin the IHs' into the E12 & E14. Or if I am completely off and I am fried from working!

I got the 2001 5VZ-FE engine, harness, and ECU/ECM, and some other things (EVAP., oil press. sender, etc. Do I need the body harness, or even the dash harness? I work at at Advance Auto, and am able to get a lot of these parts, just need to know what to get and what to do with where to go from here.

It is a 95' 3VZE A/T to a 01' 5VZ-FE A/T swap, engine is mechanically ready to go in. Sorry for the information splurge just looking for direction.

Thanks,

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Old 09-17-2019, 02:03 AM #36
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Here's the 5VZ-FE ECU/ECM with the two connectors I just picked up today. The other three plugs are coming from the engine harness. I am to re-pin those connectors with the body harness connectors in my vehicle?

These are the two connectors in my vehicle still do they need to be re-pinned?



Because I have the same ECU lay-out as the one pictured here, the E12 and E14 are body harness connectors?


Last edited by Eggslian; 09-17-2019 at 02:29 AM. Reason: Adding picture's:
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Old 09-17-2019, 02:58 PM #37
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3.0 to 3.4 engine swap

Are you using the 95 auto trans for this swap? If so, I'm not 100% it's compatable. It may totally be, I just don't have the experience with that particular aspect.

As far as re-pinning, your current vehicle body harness connections should be behind where the stock 95 ECU was behind passenger kick panel. The actual connector for these aren't what's necessarily important, it just had to make a connection. Meaning, you could literally just pull pins and connect them temporarily floating in the air and see what happens. It's a bit dangerous, but I don't know any other way. It's sort of guessing. Do you know what those IH wires are for? Like do they go to a sensor or a switch or something? I don't currently have access to a full diagram but you should be able to see where they terminate overall. And if they perform the same function, I don't see an issue.

You shouldn't need any other harnesses to make this work overall. It's all just wires. So as long as they go to the right places there's no need to run a whole new harness.

Tachometer requires a 10K ohm resistor soldered in on the tach gauge cluster. Google that and you should be able to find an image. I don't have one at the moment.

That's about all I can help
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Old 09-17-2019, 03:01 PM #38
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Also, do the e12 and e14 plug into the ECU or are those body connectors? From your pic it looks like it's to the computer directly
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Old 09-17-2019, 07:49 PM #39
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I can use either the 01' or 95' transmission, and okay I am in the correct path and on my way to getting it all done CORRECTLY!! I think!
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