[aatheiss]

Hello from the other side of the world! (I had this posted in the all questions thread, but decided to make a new post instead)

BLUF: Can I swap a 4Runner style charcoal canister in place of my Hilux Surf style?

I have created a problem for myself that I'm hoping to get some help figuring out. My JDM 1996 Hilux Surf with 3RZ-FE has a charcoal canister of a different design than was offered in the USDM 4Runners. For various reasons, I am hoping to swap/convert/upgrade(?) to the 4Runner style.

I was able to find and purchase a new OEM canister (77740-35392) and most of the hoses. My problem comes from the difference in sensor/valve electrical connections. My Surf has a single valve/connection (part #25860-75180) tied to the ECM, where the 4Runner has 3 (part #'s 25860-75140 & 25860-75160, attached to the canister, and the vapor pressure sensor mounted to the firewall, part #89460-0W070). My ECM is a 3-connector version (I believe the part number is 89661-3D180) where the 4Runner ECM is a 4-connector type (89661-3D210?). Additional info that may be pertinent, I don't have an EGR system, and my down-stream O2 sensor is plugged directly into the catalytic converter instead of a few inches down the pipe (EGT sensor part #89425-80033).

My question: is it possible to a) wire in the extra valve and sensor connectors to my existing ECM, b) fix the valve/connectors in such a way to properly operate the 4Runner style canister, or c) will I need to get a "new" ECM, reprogram it, and re-pin my connectors (or get a new harness altogether) to match?

Reference posts/pictures:

Spiker Engineering's post-engine bay refresh (so jealous, I'd love to do this!)
https://www.toyota-4runner.org/3794734-post89.html

JZiggy's 3RZ-FE (fantastic build thread, I take lots of inspiration from him!)
https://www.toyota-4runner.org/2602028-post51.html

My Surf's engine bay:

[Twisted Sid]

What's the reason for wanting to do the change?

It looks like your canister only has two ports and the remote sensor. Rather than a 3rd gen 4runner canister, I wonder if a canister from 90's 22re pickup/2nd gen 4runner would work for you? They have 2 ports and no internal sensors so your OE could be put inline just like it is now. Might have to make a bracket for it though but that would probably be easier than trying to rewire sensor.

[aatheiss]

Originally Posted by Twisted Sid

What's the reason for wanting to do the change?

Hubris, I suppose...

I haven't noticed anything to suggest my canister is failing in any way, so it's not for need of a repair.

I did get my hands on a Scarab fuse block mounting plate, which was designed to fit with the 4Runner canister. My canister is too tall and gets in the way. Rather than take the easy way out and do a canister delete, or significantly alter the Scarab mount, I want to see if it's possible to make the swap. (for the record, I will have to slightly alter the Scarab mount because my windshield wiper motor interferes with the breaker mounting tabs)

I'll take a look at the 2nd Gen 22RE canister, I hadn't thought of going that route. Thanks for the suggestion!