2UZ swap into my 78 '40

[Rusty]

One thing we haven't figured out yet is the VSS. It looks like the VSS has 2 wires coming off of it and they feed a amplifier before going to the gauge cluster then on to the ECM. We are hoping the tone ring in the transmission will feed direct to the ECM. Anybody know?

I forgot that I had a copy of the '04-'06 Tundra FSM, which I think you said you had. The Diagnostics section, page DI-701 states that...

CIRCUIT DESCRIPTION

The No.1 vehicle speed sensor outputs a 4−pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear.

After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the ECM.

The ECM determines the vehicle speed based on the frequency of these pulse signals.

So it looks like your first guess was the right one, it is filtered by the instrument cluster, how critical that is who knows.

 

[Bret]

According to the Toyota service tech Greg spoke to the amplifier is primarily for the speedo in the cluster, so we are going to try it wired direct. The VSS signal could be used for a few things, maybe timing, lean out on cruise rpm, etc. Just depends. A few folks have had trouble getting TBI systems to run flawless with one, as easy as it is to wire in we figured better safe than sorry. Also the fuel pump resistor appears to be part of the crash detection (airbag) circuit so we are deleting it since we are using an aftermarket external pump anyway.

 

[bustanutley]

You don't really need the VSS off the t-case, the speed sensor off the trans takes care of shifting. We also don't hook the low range indicator signal up to the computer in the wheelers, the low range shift points feel really odd, much rather just have it shift normal in low.

Oh, and what was stated earlier in the thread is wrong, no 2uz is full manual throttle, they are all drive by wire, but the early motors have the remote right on the throttle body driven by a cable, make sure you hook up keyed power to the +BM circuit otherwise you will have no go Let me know if you run into any questions, I might be able to help.

 

[IH8PVMT]

Ok, went and paid a visit to my local Toyota dealer, whom of which I have gone to for most things concerning this swap. My POC at Toyota was kind enough to grab a tech from the back for me because I had specific questions which Bret mentioned above.

Ok, so here is the skinny...as far as the VSS from the transmission, it generates 4-pulse per revolution, from the info found in the FSM. So, hopefully, I can hook it up to my VDO speedometer, make a few setting adjustments, and it will work. Rusty, you are correct in your assumption about the VSS, the signal comes from the VSS sender, to another 'amplifier' (for a lack of better terms) located behind the instrument cluster. The signal is then passed through the 'amplifier' to the ECM, where it transmits the proper speed to the ECM. Now, according to the Toyota tech, that is all this VSS does...it will not control anything associated with contolling the motor...A/F ratio, timing, etc. So I was able to breathe a sigh of relief when he told me that tidbit of information.

Now, when it comes to the fuel pump resistor, the tech also relayed to me that this resistor can be eliminated, seeming that I will be running and external, aftermarket fuel pump. The resistor merely makes sure that the OEM pump is getting the proper voltage required and will shutoff the pump in certain situations.

@bustanutley..thanks for the clarification about the throttle issue..the truck I found in the junk yard had the mechanical throttle linkage but I didn't dig any deeper. I am use to looking at older Toyota's, not these newer vehicles.

So, given that I have a few more connections to make (rewire the F/P relay to delete the F/P resistor), things are coming along quite nicely. I am waiting on a few parts to arrive so I can move forward. There is plenty of things to do in the mean time to keep me occupied.

Lastly, here are a few pics of the wiring thus far. Granted it is not all tied up and looking pretty as of yet. Once we get a successful startup and work out any bugs that may arise, it will be easy enough to put th final touches on it so I can mount the ECM and the relays.

I appreciate all the info thus far, I will be making detailed notes as to the wiring, should anyone be interested in doing this swap down the road.


V/r,

IH8PVMT

 

[yOHda]

Can you take a picture of where your tcase shifters are going to fall? Im just trying to get a sense of how long this swap is with the prerunner adapter. Thank You.

 

[rma1]

Looks great man..heres a pic of the box we made to house the elctronics..bolts under the glove box

 

[rma1]

Mounted

 

[IH8PVMT]

Can you take a picture of where your tcase shifters are going to fall? Im just trying to get a sense of how long this swap is with the prerunner adapter. Thank You.

I will get out there today a take a pic of where I plan to place the shifters. I guess it all comes down to engine placement and could be several possible shifter configurations.

Seeming that mine is twin-sticked, I plan on modifying the shifters and relocating them forward of the OEM location for this xfer case. That way, all 3 shifters (trans/2x xfer) are all relatively in close proximity of each other.

I'll post up later with pics to help translate my babbling.

 

[IH8PVMT]

rma1...Are you using an aftermarket engine management system? Doesn't look like an OEM ECM in the pics you posted. Either way, box looks great.

I plan to mount mine under the glovebox also, however, I will not be using an enclosure to house my ECM. The plan is to flip the ECM upside down, fuse box facing down for easy access to fuses etc. the relays will swing inboard and mount to the side of the glovebox, placed higher than the ECM. Hope this makes sense.

Once I go through the wiring checking/rechecking voltages and hopefully having a successful startup, I will post of pics of the final mounting location.

 

[IH8PVMT]

Here are a couple pics of the oil pan mod...pretty uneventful and self-explanatory. We clearenced the oil pan for insurance sake, just incase we needed future clearence when the front axle articulates.

 

[rma1]

rma1...Are you using an aftermarket engine management system? Doesn't look like an OEM ECM in the pics you posted. Either way, box looks great.

I plan to mount mine under the glovebox also, however, I will not be using an enclosure to house my ECM. The plan is to flip the ECM upside down, fuse box facing down for easy access to fuses etc. the relays will swing inboard and mount to the side of the glovebox, placed higher than the ECM. Hope this makes sense.

Once I go through the wiring checking/rechecking voltages and hopefully having a successful startup, I will post of pics of the final mounting location.

it is oem .. 1992 ls 400 engine and ecu,MR2 fuse box and ls 400 diagnostics port... 1995 fzj80 tranny ,transfer case,shifter and crossmember..

ive already started it but need to have the drive shafts made in order to drive it.
ill start a thread when im done and stop cluttering up your thread

 

[IH8PVMT]

Ah, so you are using the 1uz and a340f?


Looks as if my shifter will fall relatively close to the factory location. However, I will have to cut and re-glass the trans tunnel to lengthen it, due to me having to cut the floorpan a bit.

If you look in the pics, I will cut the tunnel just before it starts to slope down towards the back of the truck. I will then re-glass and extend the flat portion of the tunnel to allow me to mount the twin-sticks (the dom tube holding the shifters is for picture sake). Looks as if both applications will be about the same when finished.

I have the factory trans linkage, but will probably fab up my own, since it will need to be shorter. All in all, looks as if things will fall into place when it is all said and done with.

You are one step ahead of me, I have yet to start mine, still plumbing oil/trans cooler lines. No worries on posting your pics and such, would be a 'one stop shop' thread for people contemplating these swaps!

 

[rma1]

yes 1uz and the tranny is mainly a A343f , transfer case is the one that came with the tranny .. keeping the offset drive shafts and axles .

 

[IH8PVMT]

Ok, have made a little progress with things, I do apologize for not keeping this updated. I have gotten all my pieces parts minus 1, the sandwich adapter for my oil cooler. As of this moment, I have the OEM plugs in there until I get the adapter, then it is just a matter of installing it and running the lines...which I already have put together.
Here are a few pics of the progress thus far. Everything is done, plumbed, and awaiting fluids. We still need to go over the wiring once power is hooked up. I have the power cable cut (1/0 fine-wire welding ground lead) but do not have the ends crimped on as of yet. I am going to find a place with a hydralic crimper so they are done right. That way there will be no question when it comes to the connection of the power from the power source.
Just to answer the question now, the slender, compact aluminum cannister in the pics, on the pass. side, is my air cleaner. Happened upon this fine specimen when I was in the process of putting together my intake for my manifold. Everything is 3" I.D., as compared to the 2.75" OEM I.D. how much this may or may not effect things is yet to be seen. Hopefully it provides a bit more air flow for the motor. Should be fun once it is driveable....so hoping for a successful startup!!! Send me some positive cruiser mojo that this thing starts and runs without a hitch!!!
Thanks for the continued interest!!

 

[IH8PVMT]

More pics

 

[tmarx]

Looking good !

 

[IH8PVMT]

Appreciate the props tmarx....so close but yet so far away!!! One day I will get to enjoy this thing!!

 

[40Habits]

That does look good. Who makes the air filter?

 

[IH8PVMT]

That does look good. Who makes the air filter?

Thanks! Was just what I was looking for given the limited space for an air filter. Adds a little bling too!!

http://www.spectreperformance.com/i...filter-4-diameter-housing-3-inlet-outlet.html

 

[subzali]

Should be cool once it's done...