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• I'm afraid this is only a partial DIY.
• I can't remember all the steps and I did this before I realised it could be useful for other people too - specifically for my SAI delete mod.
• However, framing it under an SAI delete mod, this tune mod enables you to remove the SAI pump from the car entirely.
• The only thing you need to leave in is the small solenoid that sits under the carbon RS6 cover on the motor - the ECU still electrically checks that's connected.
• It is easy to remove the coding for that too, however there's a handful of different "bits" that it could be to disable it, and I got bored of trying - it's no big deal to leave the solenoid electrically connected but disconnected from everything else.

• If you are running a stock tune, this is simple. In my case, bought a Galletto 1260 cable and software off ebay.
• Would a generic OBD cable work - I don't know, maybe. You can certainly download the software for free - although I bought a cable too, since it was cheap!

• The Galletto software is super easy to use and lets you download, or upload, a tune.

• Most remapped tunes lock reading of the current tune.
• You can unsolder the eprom if you wish, , but it's also possible to jump the ECU at boot time which puts it into boot mode.
• This works around the lock.
• I can't remember the exact pin you need to ground when you turn the ECU on, but I think it's this one.

• If you need boot mode, google it - but this is pretty close to being on the money.
• Don't get all excited that we can all share our remaps now. A remap is almost worthless unless you also do the gearbox ECU too - which can only be done by replacing the chip physically!
• Otherwise the gearbox ECU just limits the torque anyway and the new engine map doesn't really add much value.

• Uploading is easier - you don't need the ECU in boot mode. You just grab the tune file and use Galletto to upload it.
• VERY VERY IMPORTANT. Do not jog, knock, or otherwise disconnect or interrupt the upload or you will likely brick your ECU. Potentially boot mode could fix it - I dunno. Just don't do it.

• Loading the bin file that is the tune
• Having a map on it to identify the correct memory locations you want to edit
• Resetting the checksums in the file correctly
• Saving it back down as a binary file to upload.
• For editing, I used TunerPro, which is free.

• To make this work, you need both the bin file, and an xdf template. See linkies below.
• To disable SAI, I turned off a couple of codewords:

• Which in TunerPro, you can see here :

  

• Just these 2 enables you to remove all your SAI plumbing with the exception of the electrical connection as noted above.
• Next, you then need to correct the checksums to avoid ECU complaints. I can't quite remember how I did that, but this link seems to be commonly referenced, although I don't quite remember doing it that way.

• Yes, everything I describe above I did on my own wagon.
• Initially, I reverted the car to stock - albeit it with VCDS then raising an SAI error
• I then modified, uploaded & tested a stock tune to remove the SAI and verify I was getting it right
• Then I modified my Stage 1 tune (which I had backed up in advance) and uploaded that.
• The car has been running Matt's SAI mod tune since 2015.

• All my notes above are referring to the 366304 software version, which is what my car is running.
• I believe there are 3 different software versions, possibly more.
• I suspect you'll need a different XDF/TunerPro template to mod the others - I don't know, I never looked.
• It tool long enough to learn the above as it was!

• Gallatto 1260 lead & Software
• Galletto 1260
• TunerPro
• Checksum Setter/Checker
• Tunerpro XDF/Template file needed to parse the binaries
• Nef Moto - all the guides where much of the info in this post came from

• Stock, SAI On, 366304 Tune I have run this one
• Stock 366724 Tune Untested
• Stock 360874 Tune Untested
• Stock, SAI Off, 366304 Tune I have run this one
• Stage 1 Tune, circa 510hp, SAI Off This is my current tune

• Not so much - other than to say that between some of the software above, or other software and guides on the sites, plus a bit of advanced VCDS, there is nothing you can't do to the cars, software wise.
• With great power comes great responsibility - go carefully and cautiously and research and check everything before you do anything.
• Don't sue me if you brick your car - everything I know how to do is listed here (boot mode!)
• Finally, thanks to Sweegie for the assistance he gave me when I learnt to do this back in 2015

Mɐʇʇ wrote: ↑

Fri Oct 09, 2020 1:47 pm

Thank you Nobby.

I think, but am not completely sure as I've not tried it on cars other than my own, that if anyone just wants to delete their SAI, you don't need to manually edit your tune as I had to. I think you can just use Galletto to backup the current ECU memory and then overwrite it entirely with the stock SAI off binary I have shared above. Potentially Gregstv will be able to validate this.

There is also still the odd ECU that pops up on ebay - I've been tempted to try re-flashing one of them and seeing how it goes - but I do sometimes have a life, too.

The name "Gregstv" always confuses me. I used to be on a US Speedboat forum called Scream and Fly - it was run by a bloke called Greg and he and others there had a type of boat called an "STV" : https://www.youtube.com/watch?v=59JczGrFjVw
So I always read Greg's name as Greg STV