3RZ / 2RZ Swap Notes (4 Viewers)

[liveoak]

I got my new engine running this morning and everything looks good except the tach is not working.
I have a 1985 pickup that had a 22R engine in it and I have replaced it with a 2003 3RZ and used the ORS stand alone harness, also put in the 10K resistor.
I noticed from a Combination Meter and Gauge diagram, posted by @liveoak, that there is a wire on connector "A" number 6, that should go to the ignition coil from the tach but now it goes nowhere, do I need to connect this to something. Any other thoughts would be welcome.

Did you not have gauges with a tach prior to the swap? The tach output on the 3rz ECU is on the IK2 harness and should be light green with a black stripe. My thinking is that you would need to connect that to the A6 input on the Combo Meter.

 

[ne8st8]

Did you not have gauges with a tach prior to the swap? The tach output on the 3rz ECU is on the IK2 harness and should be light green with a black stripe. My thinking is that you would need to connect that to the A6 input on the Combo Meter.

I did previously have the tach, but looking further I see that the ignition module had been changed and I think somone just took the wire from A6 and put it directly on the Accel coil for a signal. I need to check with ORS but I might be able to run a new wire from the black wire on the ORS harness where it connects to the black wire from the original emission computer harness or maybe run the ORS wire directly to the tach.
Makes things a little tougher on these older vehicles when changes have been made

Many thanks for all you posts, It's been a wealth of info for me especially as I'm in CA

 

[ne8st8]

Can anyone sugest a good scan tool ODB2 reader, the one I currently have only reads pending and trouble codes and is currently showing 0,

 

[gnob]

Can anyone sugest a good scan tool ODB2 reader, the one I currently have only reads pending and trouble codes and is currently showing 0,

basically any cheap reader.
i recently picked up a scangauge. pretty happy.

i guess are you saying you have a check engine light on but it's showing no codes?

 

[pappy]

Can anyone sugest a good scan tool ODB2 reader, the one I currently have only reads pending and trouble codes and is currently showing 0,

I asked the same question over in my neighborhood. Here are the answers.

I use a VeePeak bluetooth reader (like $20 on amazon) and OBDFusion. That app gives you access to all sensor data the ECU sees and you can customize a GUI exactly how you want. The caveat is that it takes a lot of work to customize a GUI with all the scaling needed to get the gauges how you want. The default dashboards suck IMO and need to be modified.

The Torque app seems to be a popular one for a bluetooth scanner. Any generic ELM (or something like that) will do as the hardware plug/dongle thing. The "pro" version of the Torque app gives you mode data in case the free version isn't enough.

View attachment 3607723

I also use the Torque app. I recommend getting Techstream.

 

[ne8st8]

basically any cheap reader.
i recently picked up a scangauge. pretty happy.

i guess are you saying you have a check engine light on but it's showing no codes?

No I do not have the check engine light on but I understand after the 3RZ engine swap I have to make sure that all the sensors are ready before I contact the referee.
Thanks for all the options guys

 

[ne8st8]

Thanks for the pics, one last question how far behind the second cat is the second O2 sensor, I think I see it but would you mind pointing it out

I have a appointment to get my exhaust done on Tuesday.
Did you flip the front drive shaft to get a little more room

Messed this up a little, this message is for @liveoak as I'm trying to copy his exhaust

 

[RichardSkinner]

So on the airbox topic. As I have mentioned, I am in CA and have to pass a smog referee inspection. CARB does not allow modifications to the intake system (post airfilter - that's why snorkels can be added I believe). So my 80mm extension I used to make the airbox push into the old battery spot probably will earn me a no go.

So to get around that, I ordered a K&N FIPK Intake System PN 57-9012. It has a CARB sticker that has a EO number that makes it smog legal. On 1st gen 4runners/2nd gen trucks it fits decently into the old battery tray area. It does rub on my coolant return line, so I may trim that to get it in a little tighter when I drain my coolant next.

I got it off Napa for $300, but it looks like they're up to $350 now. Honestly the quality is pretty trash for that price IMO. The HDPE casting feel cheap and the bumps are brass threaded inserts that are molded in and the molding looks cheap. However, I would recommend it for anyone looking for a CARB legal solution. Or the Trailgear Rock Ripper is the same design really but with a stainless tube and does not have the "cold air damn" that won't work anyways.

This actually frees up room for me to mount my coolant overflow better. I need to come up with fixturing for both the air damn and the reservoir still.
View attachment 3611361

And the good news: the IAC inspection/clean out in my previous post fixed my idle issue. It feels REALLY good now. The freer flowing intake may have helped some small amount, but i attribute the change largely to the IAC job. MAN I love driving this thing.

Here is another CA Legal intake method. Both the K&N 57-9012 and the Trail Gear Rock Ripper intakes have CARB EO numbers. I can't confirm the rockripper fitment, but the K&N fits into my truck.

 

[liveoak]

I have a appointment to get my exhaust done on Tuesday.
Did you flip the front drive shaft to get a little more room

Messed this up a little, this message is for @liveoak as I'm trying to copy his exhaust

I ended up changing to a single-cardan front drive shaft, having a single universal joint at each end. I put a double cardan on the transfer case side of the rear driveshaft. Basically flip-flopped from how it came from the factory. This did give me more clearance from the catalytic converter on the front drive shaft and helped with caster angle correction

 

[ne8st8]

Here is another CA Legal intake method. Both the K&N 57-9012 and the Trail Gear Rock Ripper intakes have CARB EO numbers. I can't confirm the rockripper fitment, but the K&N fits into my truck.

Maybe a little late for you but I used the TOS battery tray and EVAP mount that let the collant bottle stay in it's original location, the only issue was a group 24 battery touched the hood so go with a group 34 or Optima battery, I also kept the power steering pump and resivoir that came with the 3RZ motor

 

[ne8st8]

My truck is now ready for the CA BAR ref to check and I have a virtual appointment on May 1st.
Two of the items they are asking for

1. Deaker invoice for PCM/ECM programming (if applicable)
2. If 1996 and newer, needs software verification of donor engine

Does the ECU need any programming, it came from a different Vin as the computer in the vehicle the engine came from was damaged but it did come from the correct setup, 3RZ 4x4 manual trans.
So how could one do a software verification of the donor engine
Does anyone have a little more info for me to work with prior to my appointment next week.

 

[RichardSkinner]

My truck is now ready for the CA BAR ref to check and I have a virtual appointment on May 1st.
Two of the items they are asking for

1. Deaker invoice for PCM/ECM programming (if applicable)
2. If 1996 and newer, needs software verification of donor engine

Does the ECU need any programming, it came from a different Vin as the computer in the vehicle the engine came from was damaged but it did come from the correct setup, 3RZ 4x4 manual trans.
So how could one do a software verification of the donor engine
Does anyone have a little more info for me to work with prior to my appointment next week.

This is a direct quote of the referee email instructions to me
"An invoice from the dealership or a licensed automotive repair dealer verifying in writing that the ECU/PCM is correct for the year, make, model, engine and transmission for a Ca engine (If the vehicle or donor vehicle has Ca emissions). The invoice should contain PCM/ECU part number and verification that all OBDII system support and functionality is the same OEM configuration as the donor vehicle."

To answer your question, I do not believe the ECM has any vin information on it, however the dealer can look up your donor engine VIN and note on the invoice whether your ECU PN is correct or not.

 

[liveoak]

I just had to show proof of purchase of the donor 2001 tacoma and receipt with part number for the 2001 3rz manual 4x4 ecu I put in place of the 2001 3rz auto 2wd ecu.
It sounds like it's gotten tougher since 2015 when I took mine in.