Jackson
Hey all, I've been having a go at DIY tuning, and I'm wondering if anyone else has had the same trouble I'm having. I'm working on a 97 850 T5 with Motronic 4.3. Firstly, here is what I have done:
- Bought and fiddled with 3 different USB to K-line cables. In the end, probably could have gotten the first one to work.
- Finally managed to connect to the ECU through the OBD port using Motronic Suite.
- Bought an NA M4.4 ECU.
- Didn't test if it worked first.
- Opened it up and made a couple of solder bridges (as shown in the Tuners Rejoice thread) to hopefully enable turbo actuation.
- Set up TunerPro software and wiring according to the wiki, ready for flashing.
- Couldn't connect to it in normal mode, or bootmode.
- Tried in car. Crank, crank, nothing. I figure I either I broke it, or it was a dud to start with. As far as I'm aware, I should've been able to just swap it in, and the car would at least fire up.
- In my frustration I decided to take a risk and bench-flash the working M4.3 ECU with a very slightly modified binary. It worked, and my car still runs! (Just a note that may help others. I had to download the .NET Framework in order to get the flasher plugin to work.)
Now, for some reason, I can't connect to the working M4.3 ECU in normal communication mode. Maybe I'm doing something silly, but I can't help but think I've broken something. Perhaps there's someone else out there working with M4.3, and they can step me through how they got data logging working? I thought I would try on here before posting something on Volvospeed.
Anyway, I'm sort of excited about tuning this car now. Ideally, I would be able to find a M4.4 ECU and get it to work with logging functionality. If someone is willing to sell a spare one they have laying around, I would be interested.
Rob
I have an NA 4.4 ECU you can have if you want it, don't have any turbo ones left
Jackson
Rob, that'd be awesome. I'll PM you.
jamesinc
@Clinton, regarding the climate control mod, do you know if I can plug my 4.4 ECU into my 850 and flash the software mod via the OBD-II port, or do I have to flash it before plugging it into the car for the first time?
I am trying to establish whether it gets fried on connect, or just when you go to reds.
nickm
Disconnect the climate control and flash in the car?
clinton
Unfortunately, I have no experience with 4.3 ECUs. But with a flashed 4.4 ECU (which may be the same), it is initially set up in logging mode, which blocks normal OBD2 communication. You have to send a special character (‘o’ I think) to turn logging mode off. Maybe something to look into?
When I was starting our, I used RealTerm heaps to verify connectivity, and it was very helpful.
Sorry James, I have never worked on an 4.3 to 4.4 conversion. Maybe @Jackson can chime in?
jamesinc
nickm;75699 wroteDisconnect the climate control and flash in the car?
That is an obscenely sensible solution. Embarrassed I didn't think to do that myself.
Jackson
My AC doesn't work anyway, so I can't remember if I took any precautions with the first flash.
Raebird
Does anyone have an install guide/link for installing the wideband using the tank pressure signal wire? Can't seem to find it after many attempts searching for it...
Ghettobird
Yes, Ive done it
Ill have some info up in a few days
https://ozvolvo.org/discussion/3050/julians-850r/p8
Here I wired up a MAP sensor to use the tank pressure pins and I have since wired in my Ecotrons wideband to use the 2nd narrowband pins in the ECU, but will be switching them around soon
Ghettobird
Here are the Pinouts for M4.4
850AWD
TurboS70T5
Hello all,
Ive been very interested in beginning the journey to tune my 98 T5. I am currently attempting to set up the TunerPro RT following the Wiki M44 page steps. I am stuck at the Flash Plugin step. It states to insert 2 files in the PLUGIN download into the tuner pro root folder. However when I use the link it directs me to DropBox but it only shows me a single downloadable file. a .RAR file. Is that an updated file to replace the 2 it describes needed? Or can someone supply me with the files that they used to make Flashing possible. Thank you Sorry to be behind the times. I hope this is still an active forum. Thank you for your time
850AWD
.rar is a compressed file, download winrar program... What engine you have?
Ghettobird
Download and unzip the file using winrar or winzip.
jamesinc
TurboS70T5;143856 wroteI hope this is still an active forum.
Me too!
TurboS70T5
850AWD;c-143857 wrote.rar is a compressed file, download winrar program... What engine you have?
It’s a 98 s70 t5. Stock motor 19t , even on 13-14psi it seems to max out the stock maf about 4K and up. AFR peg 10.0 with blue injectors . With a stock r tune from Vast . So I ordered the self tune ecm set up to make some small changes to start.
Rob
TurboS70T5;c-143886 wrote850AWD;c-143857 wrote.rar is a compressed file, download winrar program... What engine you have?
It’s a 98 s70 t5. Stock motor 19t , even on 13-14psi it seems to max out the stock maf about 4K and up. AFR peg 10.0 with blue injectors . With a stock r tune from Vast . So I ordered the self tune ecm set up to make some small changes to start.
That is correct, a stock motor will max out the MAF even with the slightest boost increase. Suggest upgrading to a bigger MAF.
850AWD
BMW MAF with 3.5 inch housing seems to be the standard upgrade. But ecu needs adjustment...
Ghettobird
Any maf swap needs adjustment
Ive got the e39 540 housing in mine and it runs great after the tune was fixed
