Help 2001 tundra motor swap gone wrong!!!

2001 tundra 4.7 4x4 SR5 the motor went so we did a swap the mechanic thought he knew what he was doing and obviously he didn't. So I got my truck back and been a year so now and I get a throttle body code throttle body position sensor throttle body and it's just them codes. I've tried buying new throttle bodies I took it to Toyota had the ECU flashed and it doesn't matter what I do it keeps going back into safety mode or limp mode. And that's where it runs off the cable to pull the butterfly open. So I am aware that they didn't drive by wire in 04 and this is a newer motor. He left the intake on and put my throttle body onto the intake if I buy 01 intake will this fix the problem?

 

Number of questions come to mind but first, are you saying you have been driving it for "a year" and it just now started acting up ?
A few things have to be added if they changed you to ETCS throttle body instead of conventional throttle body....different wiring, accelerator pedal position sensor added to accelerator pedal, throttle position sensor was changed, limp-mode control during the fail-safe mode has been changed....etc. Also, in case it matters, what were the actual code numbers ?

 

Yea can't figure it out. I've bought new throttle bodies. My gf is at work. It's 2nor 3 codes all throttle.body codes. Gas pedal goes to the floor. Shifts at 3000rpms. The guy tried effing with the wires to the throttle body so I just bought a new harness. But I read that the swap he shoulda took the 01.intake off and put it on the newer motor. So I'm going to buy in 01 intake and try that. And it's intermittent too. Sometimes it'll run fine

 

Definitely need the specific codes and we may be able to offer some help.

 

I'll run the scanner tonight and specific. I know it's throttle position sensor.and throttle body something else give me a couple hours I'll get back to yall. I appreciate it I love my truck.

 

00-02 tundras have known throttle issues.

you drove it for a year before this happened? or it started right away? 04 throttle would literally never just plug in and work on the 00-02 style

 

Yea it's been like this ever since I got it back. It's drive by wire in 04. So I e replaced everything but the intake manifold. The motor was swapped but he put the 01 throttle on the 04 motor. Wire harness is the same. No from what I've been reading the last few days is when doing this you sjod take the whole manifold.fromcthe 01 and put on the 04. He didn't do that. I let the truck sit for 6 months cuz I was pissed off about it. Then I just started throwing new parts into it and kinda forgot about it lol. Then took it too Toyota they were amazingly.stupid. I told they to flash the ecm. Something to do with the butterfly degrees? Anyways they did that it worked for 2 weekz. Then one day I got on it and fell back into limp mode. So either intake or ecm? I guess im really just hoping someone sees this too save them the trouble. Can't be anything else

 

And too make this a little more clear. 01 throttle body on 04 motor. 01 everything else. 04 motor was shipped without a throttle body

 

Technically that should be fine unless it’s a 05-06.

 

One issue that presents it self is corrosion in the driver kick panel area that leads to throttle codes

 

Ahh!! I read about this last night. It definitely has some rust issuees. Had the windshield changed and the technician told me that anybody else wouldn't know done the job because there was so much rust at the top crossmember I guess there's like 10 or more inches of rust or not supposed to do it because of liability but he did it anyway.

 

Is there a way to identify the motor? It is supposed to be from Japan and that also why it didn't have the throttle body? Emissions?

 

P1129 electric throttle control system not detected
Snap on solus

 

Sounds like the ECU (that I assume is from the 04?) Is looking for the electronic throttle but it's not getting a signal because it's not there and it doesn't like it.
Sounds like you need to swap to 04 style setup.

 

Na the ECU is an 01 setup? Or else there would be one plug to the drive-by-wire system as opposed to the 01 throttle body has three wire plugs that go to it and that's what I have

 

That fault really makes it sound like some part of the truck is an 04 part. Just because you have the 01 wiring going to the throttle body doesn't necessarily mean that the ECU couldn't be from the 04 right? ECU connector could be the same even if different year. Like maybe 04 ecu but 01 wiring harness hooked to it.
Hopefully you will get some better help in the morning hours.

 

I believe 04 pin out is pretty different which would mean way more issues likely

 

I'm just throwing out ideas. Theres gotta be some component that is part of the 04 system if it thinks it wants to see an ETC system.

 

Honestly I’d be looking at wiring. Not hard to mess up the harness swapping an engine. And these are notoriously bad throttles.

 

The the gf home from work?? Now you got me wondering….

 

The ECU is the original 01 ECU. The truck drives starts up fine so if you're wondering why my girlfriend drives the truck back and forth to work she does it's only a mile up the road I let it sit for a couple months and it started misfire and put some fresh gas in it and she purrs like a kitten but she still runs in limp mode and again it's intermittent.

 

So I've been chasing my tail with it. I believe when he took the throttle body off my 01 motor and put it on the 04 motor it needed to be flashed to set the throttle position sensor to a certain degree? If I'm wrong please correct me. I don't think he knew that so he proceeded to cut one of the wires to try to jump something. That didn't work so he spliced them back together. And that's where I think my problem is. So I have a new wiring harness coming and then I'm going to take it back up the Toyota and have the ECU flashed again. Because I did take it to Toyota and have it flashed and it worked for about 2 weeks and then one day I just mashed the throttle and it fell out and a safety mode.

 

If any of you guys have ever been extremely pissed off beyond 10 on a scale of 1 to 10 that's where I was at with this mechanic I've never been so frustrated. I can't believe we live in a world where somebody will take on a job and not know what they're getting their hands into. I appreciate everyone's 2 cents. And I'm just hoping that somebody that is getting into this swapping issue sees this thread and saves them to trouble because I'm pretty sure if he would took the whole intake manifold off my '01 and put it on the 04 we wouldn't have this issue or if he would have took the truck to Toyota and had the ECM flashed after he took the throttle body off the manifold before he cut the wires I don't think we'd be in this situation either idk. Well I'm waiting for a wiring harness I'm going to try that if that doesn't work I'm going to pull up an 01 manifold if that doesn't work then I'm going to buy ecm

 

I just don't understand why, if that guy had both motors, he wouldn't just swap the intake and damn sensors over. It's not that much more work, and it's what would've ended the job properly.

 

Yea I know. It was terrible. Because I lost it on the guy and he worked on my family's cars for years and basically after I went out there and went off on them my dad kind of stepped in and talked to the guy and they try to do whatever they could and I wasn't able to say anything anymore I was going to end up in jail

 

I mean I think ge did the sensors cuz the only code it throws is a throttle body code so I mean everything else and and it's intermittent is what's weird because it'll run like a champ sometimes. And I really love that truck I had an '07 tundra as well and i don't like it I got rid of it

 

I'm 36 years old and I was taught when I was about 12 years old never cut fatory wires. N he did that to try n rig it. And half of me thinks if he didn't n took it to Toyota and had it flashed it woulda worked. Because it took it Toyota had it flashed it worked for 2 weeks then went back into safety mode. So I think the ecm isn't getting the correct voltage or current or whatever it's looking for.

 

Does anyone know for a fact if you take the throttle body off the manifold on the 00 02 4.7. does it have to be set by a computer? Haynes manual says so.