Seatbelts

Swap's done, and it runs great! but not for long...
Starts up no problem; revs great, but once it wants come to an idle it runs rich and just drops off.
Seems like it's not picking up the airflow sensor (cause it acts the same if it's unplugged) but i've got power and continuity to it.

Well whatever it is; it seems like and emergency shut down of sorts; so i'm sort of at a loss for where to start looking!

Any suggestions at all would be amazing! thanks in advance

As per usual, pics for advice!

Rerunn

In my experience with these the maf can cause some wild stuff. Tried cleaning it?

Seatbelts

Well that's what i was thinking too, cause i got all my stuff from an auto wreckers.
What's the best way to clean it?

Rerunn

Use brake cleaner just pull it out spray it down and let it air dry. DO NOT USE THROTTLE BODY CLEANER

Seatbelts

lol fair enough, any idea what kind of wiring mix up could cause this? EDIT: Let it run as well as not letting the smoke out?

Seatbelts

So Quick question, this is what i have as far as ECU plugs \/\/\/\/

\/not my pic but basically this\/

But this is more what i've been finding they SHOULD look like \/\/\/\/


soooo what year ECU do i actually have? It's suppose to be a 98'..... starting to look like its not though....

Seatbelts

looks like its actually a 04' but i can't tell the difference after 2000'
and i really feel like i should have more plugs!

rworegon

Give us a good shot of the ECU part number label.

Seatbelts

Yeah I called the wreckers i picked the engine up at, and they still think it's a 98'. I'm confidant it isn't...
So i'm gonna run to the shop it's parked at and grab those numbers tomorrow morning.
I'm hoping the shop can pull the ECU diagrams too while i'm there.

slacker

iTrader: (1)

plugs and pins don't mean anything , as long as it is matched to your harness .. for example
/99 Tacoma and /99 4runner computers are completely different , and one looks like the pic you posted , and the other looks like the other pic you posted .

I would assume this problem exists in your wiring


.

Seatbelts

The problem is obviously wiring.
It's not about the pins or the plugs;
the problem is that the plugs i posted don't match up to the 98' 4Runner's plugs on the diagrams, that style of plug seems to be mostly found post 2000.
(The ECU pic's aren't of mine)

rworegon

The second ECU picture is this:
http://www.toyotapartszone.com/oem/t...661-04450.html

Is there a five digit number stamped on each of those plugs you are holding? If so, what are they?

Is everything installed on the engine i.e. intake tube, O2 sensors, etc. before you are trying to run it?

What wiring did you do between the engine and ECU? What ECU is in it?

Seatbelts

Sorry i guess i wasn't very clear, The engine is completely installed; the engine+ECU are a pair and came together, no wiring done in between there.
I'm trying to wire the engine harness from the 5VZ into the main harness on my 94' pickup
From This \/\/\/

To These \/\/\/

Seatbelts

Ok so; got the numbers from the ECU

and ebay tells me it's a 00' which makes sense but now i need some new wiring diagrams,
anyone got anything on hand? save me the 2 days subscription on TIS?

Seatbelts

nvm! found it!
http://web.archive.org/web/201101022...ttora.com/FSM/
Edit:nvm again.... no EWD's there...

rworegon

http://www.toyotapartszone.com/oem/t...661-3D560.html

Seatbelts

Thank you kind wizard! I've knuckled under and got another two day trial on TIS.
Anyone want anything while i'm there?
Pic for Pic god

wyoming9

iTrader: (1)

Do I have this correct .

Your trying to run the engine without the engine harness merged into the truck harness??

So you are unable to read the codes that poor engine is no doubt showing ??

That would point right to the problem area and tell you just what to check.

MAF sensors do go bad as well as ECM`s

You always have to source the fourth plug for the ECM because it is not on the engine harness.

dntsdad

This would be like plugging your computer into the wall and nothing else and wondering why nothing works. There is a keyboard, mouse, monitor, etc, that needs to complete the installation.

Same thing here..

Wiring everything up. Have you been through the 3.4 swap forum here at yotatech?

Seatbelts

yeah i've since figured out that i'm just missing one of the ECU plugs, nothing else seems to be wrong. I'm going to pick it up tomorrow hopefully.
It was my fault for trusting the wrecking yard to know anything about anything...