82 pickup 3rz Swap DD

[1985CRAWLER]

The engine needs the vss signal for a few reasons one of which is the ECU needs to know if you are moving when you decelerate so it can ignore the lean condition that occurs on decel. also it knows it can cut the fuel to the injectors at that time. Without the signal the truck will "buck" on decel and waste fuel not to mention the possibility of throwing related codes such as lean. it's very easy to find and connect.

Exactly what i am seeing, i am driving around with a pretzeled rear driveline do i cant go over like 40 mph but i experience the buck on decel as i let off the throttle . I have a 3rd gen gauge cluster with cable speedo and manual 3rz ecu, how can i tie these two together as you say you can do? Just a wire or?  Sorry sparky , dont mean to be clogging up your thread with all this vss code crap

[redneckcustoms13]

Yes your cluster has a vss output on the back simply run a wire to the pin on your ecm and she should read it.

Andrew, your fuel mileage is par for the course from what I've seen personally with these engines. People can talk all they want about this supposed 25 mpg they get. My 98 taco gets 14-16 mpg with 31s and 4.10 gear, the brown truck gets 16-17, my buddys 96 taco with 4.56 and 31s gets 16 or so. The only one I have ever seen go more than that Is an 83 2wd a friend has with a 3rz and he gets about 19-20

[SqWADoosh]

Yes your cluster has a vss output on the back simply run a wire to the pin on your ecm and she should read it.

Andrew, your fuel mileage is par for the course from what I've seen personally with these engines. People can talk all they want about this supposed 25 mpg they get. My 98 taco gets 14-16 mpg with 31s and 4.10 gear, the brown truck gets 16-17, my buddys 96 taco with 4.56 and 31s gets 16 or so. The only one I have ever seen go more than that Is an 83 2wd a friend has with a 3rz and he gets about 19-20

Well I have the same vss problems so like I said above I am working with liveoak to try and solve them.

[Sparkplug]

I'm definitely hoping for better than 19 mpg. My 4 litter double cab tacoma gets that. I hope a truck that weighs almost half as juch, with half the engine gets better. Big Mike said he got 17 on 37s fully loaded down. We shall see. I'm a mpg pincher. Pet peeve is my dd has to get above 20 mpg. If this won't. I won't dd it.

[redneckcustoms13]

Don't get your hopes up. Unless your going to run 31s on 7 wide wheels and 4.11 gear.

[redneckcustoms13]

Put the 1gr in it and call it done lol

[Sparkplug]

I'll be running 31-33 on 456-488. And I drive about 65 mph. I usually pull near the top end of the mpg range on vehicles. I hope so with this one. Thats the ultimate goal. I commute to work and need it to get good mpg.

[redneckcustoms13]

I tried the 65 mph thing. I got passed by a prius and said fork it and got back to 75 where mine likes to run best

[Sparkplug]

So, my truck being carb. It has none of the efi relays needed to run the engine. I basically only have the ignition cor. But I found the fuel pump harness and the associated relay. I have a diagram of all 3 cor that control it running and starting. It appears fairly simple. But I've said that before. Still on the fence about whether to use the tacoma engine fuse box, or make my own. They both seem like they would be the same amount of work. I kinda like the look of the stock fuse box though. We shall see. Hopefully by Saturday morning I have all the engine side and body side rz stiff done including the relays. If so I'll be tearing into the 1st gen all weekend to get all the carb stuff stripped.

I sent chilkat an email asking about their mounts and if they have been fixed. Still waiting on a reply. I get impatient with companies easily tho and might just end up making my own.

Edit. Its only 1 cor for the fuel pump

[Sparkplug]

Ran into first issue. I have a buddy with a tacoma wiring book from toyota. He's in oregon at the moment but coming down next week. I'm impatient so I had him send me some pics. I want to remove all the auto stuff from my harnesa. I dunno. It would bug me having plugs just hanging. All I really need off it is the 2 o2 sensors and the reverse lights.

Here's the problem. The plug has 4 wires. The diagram only matches 3 colors. I know I should just assume the wire is correct but I don't want to put this thing together and be chasing problems. It calls for a red and white.  White. Brown. And a pink and green. I do not have a pink and green. Mine is clearly red and black. I can't find any pink and green wire. This is o2 sensor 1. My other sensor matches the diagram correctly. should I just assume my red and black wire is supposed to be pink and green?

[Sparkplug]

For some reason tapatalk isn't uploading my images right now. But picture a black and red wire where a pink and green one should be. I'll try and figure my pics issue out.

[Sparkplug]

I got it all stripped. My engine harness basically is a manual harness now. Possibly even simpler. That took quite a while. I had to leave the runner boot on the harness because to remove it in would have had to depin the entire harness. Not sure how they installed it from the factory. Was kind of a pain. I got it done tho. And the harness is much cleaner now.

[redneckcustoms13]

Good deal, you could always just check continuity across that wire in question at ecm end and plug end. That is what we had to do non mine the fsm schematics were close but not quite accurate on the donor nor the rig.

[Sparkplug]

That's what's I ended up doing.  Pics aren't working for me me some reason. Tapatalk is iffy.

[Sparkplug]

Got the 1st gen harness out and ready to strip it down to the bare essentials. Someone correct me if I'm wrong, but basically all I need of of this harness is the ignition circuit, the lights, wipers, and gauges. Correct? I also taped things like the seat belt sensor and the door buzzers before I removed them, so I will retain stock features like that. The goal here is a clean look when you pop the hood. Opionis and criticism is always welcome.

[kneedownnate]

I know you're living in the red bluff area, but that front porch looks exactly like the one at my last house

[Sparkplug]

It's a wrap around deck, fully covered. It's actually one of the best built decks I've ever seen. The guy did an excellent job

[Sparkplug]

Got my 82 harness stripped of everything carb related. I have all my wires off the cluster labeled ready to wire in the e5 plug from my tacoma harness. All that is left to do as far as electrical is modify the tacoma engine fuse box to have the bare necessities to run the engine, and tie the fuel pump harness and relay into my 82 harness. Other than that it's basically done. Ill have my bellhousing by Thursday and will be able to start engine mounts then. I can't begin to align the engine till I can bolt a trans to it. I should have ot driving by the end of the month for sure.

The 82 and 83 trucks have the spot for the speed sensor on the back of the cluster. It's a green wire. Pin 4. Speed sensor +

[Sparkplug]

We have super heat resistant insulation at work. It's designed to allow restaurants to run their exhaust for their hoods directly against a wall. You can hold a torch on one side, and your hand on the other, and feel almost 0 heat. I'm going to pad the entire area around and under the exhaust with it  should be perfect. The stuff is crazy expensive but I'll just use scrap pieces for free. I'm pretty sure I'm going to get the mini header also. Will make the exhaust routing easier.

The insulation is called super wool

[redneckcustoms13]

Ad far as fuse box look in my build and you'll see the one we used. It's from a mid 90s corolla has the exact amount of terminals for relays and fuses you'll need to make her run.

[Sparkplug]

Sorta first issue. My wiring all shows a 7.5 start fuse. The neutral switch and start circuit off the ecu join a 7.5 fuse, and then tie into the efi relay. I cannot find this fuse on either of my harnesses? There is no fuse in the box labeled sta or st. There is a relay. No fuse. Am I correct in assuming I just tie both the wires coming off the ecu together into a 7.5 fuse. And join that with the wire coming off my efi relay?





I also need to figure out my charge lamp, but I believe it will tie into a wire I have that comes off the fuse box and runs to the at harness. I need a full wiring diagram before I can finalize everything. But I'm in the home stretch.

[Sparkplug]

[Sparkplug]

Yeah. Thats pretty much what I figured. I got a tangled mess of what's left of my tacoma body harness. I'm sure that fuse is in there tho. But I am going to exactly what you described. Should be fairly simple. Thanks for the information.

[1985CRAWLER]

Nice work man ! Where's the 3rz?

[Sparkplug]

Only pic I got of it so far. Lol. I traded that 22r for a front axle with highsteer, full knuckle rebuild,  and chevy leaf hangers and shackles. So all that will be getting installed as soon as the swap is done and dialed. I'm going to do highsteer with no power steering. The truck doesn't have power steering now, and I fell in love with the lack of bs and hoses because of it. I'll find a manual ifs box so it's not a bear to turn. Shouldn't be too bad, should free up a couple hp, and will make the engine bay that much cleaner.

I got my harness about 90 percent done. I have to tie in the am1 and am2 wires into my ignition. I think I know where and how, but I'm gonna double check with a diagram first. I've already had 3 splices because I got hasty. Not too bad considering tho.

I also have a few wires near my cluster I dunno what to do with. One is the charge lamp idiot light. I couldn't figure out where to wire this as my truck was sr5 and had a volt gauge. I also had a oil pressure gauge bit I forgot to get the sender when I traded the motor. So I don't have that sender anymore. So I just tied that wire into the oil dummy light on my cluster. I believe that's correct. I'm going to try and source a 82 or 83 fsm. If anyone has any 1st gen wiring diagrams it would be appreciated.

[redneckcustoms13]

They made an ifs truck that was 4wd and did not have power steering?

[Sparkplug]

Yes. Some of the carb 4x4 ifs trucks had no power steering. Possibly some of the efi ones also, but I've only seen carb ones personally.

[Sparkplug]

After some headache, snd a bit if research. I've learned my ignition only had IG ST and AM. no IG2 ST2 or AM2. As far as I can tell I just eire both IG together. Both ST. And both AM.

Anyone else see anything wrong with that?

[SqWADoosh]

[redneckcustoms13]

Man if I could have had ben make a schematic with instructions as he wired mine we would be in business. Yes I do believe you tie them together and roll out.