Hi , did the tune fix your shifting woes?
VF Tuner ECU/TCU Tuning for the GX550
- Thread starter VF Tuner
- Start date
has anyone from australia successfully had their ECU flashed? i am struggling to have the VF tuner read the ECU from the CAN connect cable / read directly from the OBD.
Not from Australia but I have flashed mine. You cannot read or flash the ECU via the OBD II port. Doesn't matter where in the world you are.
It can only be flashed via the CAN connect cable that has to be connected to the port behind the dashboard. This guide shows how to do it: https://cdn.shopify.com/s/files/1/0885/5830/files/CAN_CONNECT_Cable_for_the_GX550.pdf?v=1743524640
The wiring loom in Australia is different from the US which means with CAN connect cable I can't even read the ECU. Hence asking if anyone from Australia specifically.
Gas mileage update post 93 octane tune. Today I drove a total of 244.2 miles with 230 of it being highway driving with cruise control set to 76 mph.
It was just me in the car on the way to a supplier to pick up inventory but on the way back I was carrying 900 lbs in trunk. I filled up before and then filled up again when I returned. It took 11.81 gallons of fuel to refill the tank which works out to a combined 20.68 mpg. Would have likely been an mpg or 2 better without the extra 900 lbs on the return trip.
Overall very happy given that the GX is about as aerodynamic as 2 bricks.
It was just me in the car on the way to a supplier to pick up inventory but on the way back I was carrying 900 lbs in trunk. I filled up before and then filled up again when I returned. It took 11.81 gallons of fuel to refill the tank which works out to a combined 20.68 mpg. Would have likely been an mpg or 2 better without the extra 900 lbs on the return trip.
Overall very happy given that the GX is about as aerodynamic as 2 bricks.
I had the dealer flash my transmission computer a while before I installed the VF tune. I've noticed a few clunky shifts back down to 1st but not nearly what it was before the dealer re-flashed or re-booted or re-set or whatever they did. The tune hasn't seemed to affect the old shifting issue at all.
I only ask because I had the VF tune variant on my Tacoma which fixed the shifting issues with that drivetrain … was hoping it cleaned it up on this platform
Alright I got the CAN connected. Sent my ECU read to VF, they need 48-72 hours to support it and send me the tune files.
Is it smart to run the 91 tune for a time before moving to 93, to not stress the engine right out of the gate?
How does switching between eco and sport mode work now, same deal?
Is it smart to run the 91 tune for a time before moving to 93, to not stress the engine right out of the gate?
How does switching between eco and sport mode work now, same deal?
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Still all works the same. Just more power and better shifting.
Oh lord. No. Don't use pliers. You'll want a small tip long screwdriver to depress the locking tab. It will slide apart pretty easily then if you take that approach.
There was no way I could hold onto the end plug without using pliars. And I couldn't find any slot that could be depressed to release the end plug. Information that should included in the instructions. I even emailed them for assistance and got nothing back.
You hold the plug in place using a trim removal tool that slides between the plug and the white clip. You'd then use the flat head screw driver to depress the locking tab. It will then slide apart.
These are the tools.
Thanks! I was able to finally get it off. Connected the CAN cable and connected it to my laptop. Then it got dark, so I'll finish it tomorrow. But after I unplugged everything. I got a Check Engine Light and System Malfunction. I'm going to assume I'm going to be able clear those codes?
Yes. You can clear the codes using the Diagnostic tool in the VF Tuner software.
Sorry in advance if my question seems silly……….
As an Alaskan, we only have 90 octane as the highest available at the pumps, and then have oxygenated blend for the winter months as well. Does this mean the only option is the 87 Tune, or would the 91 Tune work and just self regulate?
Thread has been a great read, thank you to @VF Tuner and to all who have contributed!
As an Alaskan, we only have 90 octane as the highest available at the pumps, and then have oxygenated blend for the winter months as well. Does this mean the only option is the 87 Tune, or would the 91 Tune work and just self regulate?
Thread has been a great read, thank you to @VF Tuner and to all who have contributed!
Have you guys been able to make the Transmission shift more appropriately?
@vftuner I've been emailing about getting my tune files for a week with no reply, update on order #17511?
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