- 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.
There are a few things at play here
- 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