ATW ME7.1 to ME7.5

[Corrado_Guy]

I have a 2000 Audi A4 - 1.8T with the ATW motor and I am going to upgrade this car from the narrow-band ME7.1 to wide-band ME7.5. After researching this I have read a few ways of doing this which would be to swap the engine harness and some of the sensors or run a wideband conversion harness. I am using the second route, I am going to run the conversion harness which takes the least amount of parts and effort for the same end result. ME7.1 and ME7.5 are essentially the same with the exception of the wideband parts and the functions that support it so pretty much everything that is already there should support the swap. From my reading I should only need the following...

- ME7.5 ECU
- Wideband O2 sensor
- Narrowband to Wideband converter harness
- Software to support the mods

That is about it, with these parts you should be able to convert from narrowband to wideband.

For the harness I went with the one made by Raceline Wiring Solutions which was $125. This harness simply plugs into the existing narrowband O2 sensor plug and then you plug the wideband into it and then wire these into the existing ME7.1 ECM harness. There is also a VVT delete resister built into this harness, it is the gold box on the harness pictured below.

http://www.raceline-ws.com/rlwa_18_adapter



I also needed an ECM that was wideband so I went with the one from the 2001 AWM 1.8T used in the A4 so everything would be as close as possible. I found a '4B0 906 018 M' which also happens to be from a manual so no changes should be needed to get this to work properly right away. If you get one from an automatic it is very simple to change this setting so this is not the end of the world by any means. My buddy made a rig for bench flashing and modding ECM's so I threw it on and I can communicate with it so it is looking pretty good although I am having issues with it, I think I paid $80 or so for this from eBay.



My car is currently running a Uni 440c Stage 3 tune but I am not really happy with how things are going with it and I don't want to create my own tune so I decided to go half way and go with Maestro from Eurodyne. I went to VND Motorsport which is owned by Shawn van Neer who is like a god in VW/Audi tuning world and I bought Maestro for $799 and a wideband O2 sensor for $125.

http://www.vndmotorsport.com/





I also decided to upgrade the injectors for larger ones so I will be swapping out my 440cc Siemens injectors for 630cc Siemens injectors when I do the upgrade. I also bought these from VND Motorsports but I forget what I paid for them.



Currently my car is running the following....

- GT28RS Turbo
- Baily DV
- TiAL 38mm wastegate
- CTS Turbo manifold
- 3" stainless downpipe (no cat)
- Siemens 440cc injectors
- Unitronic 440cc software
- 225hp Audi TT MAF
- Kinetic FMIC
- Walbro 255LPH Inline Fuel Pump
- South Bend Clutch Kit SBC Stage 3 + flywheel
- APR SS Cat-back exhaust
- 3.0 Bar FPR
- 2.0L FSI coils
- MBC (N75 bypassed)
- N249 delete

So the first thing to do was collect the parts which is done and the next thing was to test the ECM I bought and made sure it worked. My buddy made a rig for flashing when the ECM was out of the car so I put mine on this and booted up the ECM. It had 11 stored codes and would only drop down to 7 when I cleared them but the ECM is out of the car so I won't be able to clear them all. The test rig is not very pretty but it uses a power supply that was built for testing aviation electrical equipment so it is pretty accurate. The rest is kind of bread-boarded together and as long as you pay attention when making the connections it is all good.



Here is the complete package less the injectors...



I am having an issue pulling the flash off of the current ECM, it keeps complaining about not connecting to the cluster so I ordered a MPPS v12 cable to see if this will do it so once it gets in I will give it a try. If I pull the ECM apart and start it in boot mode I should be able to capture it but I want to see if I can do it with it booting normally. I have to get Maestro going on my laptop and send off a snapshot to Eurodyne to get things moving.

[Mad Cow]

Just boot mode it, though you shouldn't have any issues in the first place. Also you can get galetto working on a that generic blue cable, there's a post on nefmoto with the download. What are you going to do about the VVT? You'll still get a set point not reached code with the resistor.

[NewDays]

I'm doing the same thing as you but with a unitronic 630cc tune on the AWM ecu I bought a few months back along with the raceline wiring harness, but when are you planning on installing all this? My set date is late April to start the build so I may be asking you some questions here pretty soon.

[ddillenger]

ATW=me7.5 as well, just narrow band. The large ecu connector will have a different key, it will have to be drilled out of the new ecu in order to properly fit the plug. ALSO! The new ecu will have an immobilizer, which will have to be disabled prior to bench flashing. This is easily done.

This part will cover removing the immobilizer, providing the tools to do so, and the immo-off file.

The guy that wrote this is pretty well informed if you ask me.

As for the galletto,

The same guy wrote this. I hear he's pretty good with the ladies too.

Although once the immobilizer is removed you can read/write on the bench without bootmode. Keep in mind if you write in bootmode you'll have to rewrite using the higher level vag protocols or be stuck with a dtc stating something allong the lines of "programming not finished".

[NewDays]

AWT=me7.5 as well, just narrow band. The large ecu connector will have a different key, it will have to be drilled out of the new ecu in order to properly fit the plug. ALSO! The new ecu will have an immobilizer, which will have to be disabled prior to bench flashing. This is easily done.

This part will cover removing the immobilizer, providing the tools to do so, and the immo-off file.

The guy that wrote this is pretty well informed if you ask me.

As for the galletto,

The same guy wrote this. I hear he's pretty good with the ladies too.

Although once the immobilizer is removed you can read/write on the bench without bootmode. Keep in mind if you write in bootmode you'll have to rewrite using the higher level vag protocols or be stuck with a dtc stating something allong the lines of "programming not finished".

I've heard that it is a myth that AWM ecu's have an immobilzier, but the B6 ecu's do. Aswell as in the instructions given by raceline there is no need for any drilling for proper install.

[ddillenger]

Narrow band is on the bottom, wideband the top. And I should have said the new ecu MAY have an immobilizer. Very easy to determine, connect with VCDS to the ENGINE, and see if the EXTRA fields are blank.

[IMG][/IMG]

[ddillenger]

Also, may want to reconsider the siemens injectors. The spray pattern looks more like a hose than a mist. EV14/ID's or bust. Idle misfires are the norm with deka's.

[k0mpresd]

I've heard that it is a myth that AWM ecu's have an immobilzier, but the B6 ecu's do. Aswell as in the instructions given by raceline there is no need for any drilling for proper install.

its not a myth. audi awm does not, awm passat does.

[redline380]

What are you going to do about the VVT?

cant help much, but i can say maestro on the awm ecu wont care much about anything. you can check the readiness of vvt off if you want, but i think i unplugged my vvt and never got a cel. however it does get annoying. even when i know something is wrong (like misfires) i wont get a cel or codes and i want them to help figure out the issue.

can also say there certainly is not an immobilizer on an audi awm ecu. not doubting kompressed knowledge since i know he knows, just restating the fact. there is no immobilizer.

[NewDays]

its not a myth. audi awm does not, awm passat does.

Well there's the exact answer, thanks k0mpresd, he knows his shit.

[Corrado_Guy]

Thanks for the replies....

Just boot mode it, though you shouldn't have any issues in the first place. Also you can get galetto working on a that generic blue cable, there's a post on nefmoto with the download. What are you going to do about the VVT? You'll still get a set point not reached code with the resistor.

Galetto will connect but gives errors as well but this was just the initial post so I will get more into this later. I am just going to tune out the VVT with Maestro and be done with it and see how this works.

ATW=me7.5 as well, just narrow band. The large ecu connector will have a different key, it will have to be drilled out of the new ecu in order to properly fit the plug. ALSO! The new ecu will have an immobilizer, which will have to be disabled prior to bench flashing. This is easily done.

This part will cover removing the immobilizer, providing the tools to do so, and the immo-off file.

The guy that wrote this is pretty well informed if you ask me.

As for the galletto,

The same guy wrote this. I hear he's pretty good with the ladies too.

Although once the immobilizer is removed you can read/write on the bench without bootmode. Keep in mind if you write in bootmode you'll have to rewrite using the higher level vag protocols or be stuck with a dtc stating something allong the lines of "programming not finished".

This ECM is out of a 2001 B5 A4 and the immobilizer is not enabled, when I checked the ECM after I first had it booted to confirm it would power up I only have FF FF where the secret code should be. I will post some info on the issue I am having a bit later which should make it a bit more clear. I have used a number of different programs and they have all failed so it is common across all apps which could be a number of things.

Also, may want to reconsider the siemens injectors. The spray pattern looks more like a hose than a mist. EV14/ID's or bust. Idle misfires are the norm with deka's.

That is interesting, a lot of tuners swear by these things but I already own them so I will give them a shot and see what they do.

cant help much, but i can say maestro on the awm ecu wont care much about anything. you can check the readiness of vvt off if you want, but i think i unplugged my vvt and never got a cel. however it does get annoying. even when i know something is wrong (like misfires) i wont get a cel or codes and i want them to help figure out the issue.

can also say there certainly is not an immobilizer on an audi awm ecu. not doubting kompressed knowledge since i know he knows, just restating the fact. there is no immobilizer.

What tune are you running? Some tuners such as Uni tune out misfires and you can have a coil go and you will not get a CEL. I lost at least one coil with my Uni 400cc tune and there were no indications of an issue even though a coil had obviously failed. I limped the car about 20 kms to my parts place and it ate about 1/2 a tank of fuel and nothing was stored. At some point I was also checking the adaptation channels for misfires trying to dig into the Uni lean at idle issue and the adaptation channels were disabled.

I don't know about the AEB motors but all ME7.1 or ME7.5 have immobilizers, in North America they were never used but it is present in the ECM and just in a disabled state. I bought an ECM from a B5 simply because it would be the closest match to everything in my car and one of the first things I checked for was the presence of an immobilizer and mine is disabled.

[catbed]

Also, may want to reconsider the siemens injectors. The spray pattern looks more like a hose than a mist. EV14/ID's or bust. Idle misfires are the norm with deka's.

I agree about the dekas, and will be upgrading to ev14s soon, but my current dekas run fine at idle. Smooth and no hiccups with the 2.0t coils/dwell maps

Thanks for the replies....



Galetto will connect but gives errors as well but this was just the initial post so I will get more into this later. I am just going to tune out the VVT with Maestro and be done with it and see how this works.



This ECM is out of a 2001 B5 A4 and the immobilizer is not enabled, when I checked the ECM after I first had it booted to confirm it would power up I only have FF FF where the secret code should be. I will post some info on the issue I am having a bit later which should make it a bit more clear. I have used a number of different programs and they have all failed so it is common across all apps which could be a number of things.



That is interesting, a lot of tuners swear by these things but I already own them so I will give them a shot and see what they do.



What tune are you running? Some tuners such as Uni tune out misfires and you can have a coil go and you will not get a CEL. I lost at least one coil with my Uni 400cc tune and there were no indications of an issue even though a coil had obviously failed. I limped the car about 20 kms to my parts place and it ate about 1/2 a tank of fuel and nothing was stored. At some point I was also checking the adaptation channels for misfires trying to dig into the Uni lean at idle issue and the adaptation channels were disabled.

I don't know about the AEB motors but all ME7.1 or ME7.5 have immobilizers, in North America they were never used but it is present in the ECM and just in a disabled state. I bought an ECM from a B5 simply because it would be the closest match to everything in my car and one of the first things I checked for was the presence of an immobilizer and mine is disabled.

My unitronics tune did nothing with misfire recognition. Misfire recognition is enabled and certainly showed it when I blew a coilpack.


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[k0mpresd]

Some tuners such as Uni tune out misfires and you can have a coil go and you will not get a CEL.

My unitronics tune did nothing with misfire recognition. Misfire recognition is enabled and certainly showed it when I blew a coilpack.

this all has to do with if you have any emission deletes and if the tuner did them individually or just 00'd the whole block of codewords. misfire recognition being in that block.

[mysman]

I have a 2000 Audi A4 - 1.8T with the ATW motor and I am going to upgrade this car from the narrow-band ME7.1 to wide-band ME7.5. After researching this I have read a few ways of doing this which would be to swap the engine harness and some of the sensors or run a wideband conversion harness. I am using the second route, I am going to run the conversion harness which takes the least amount of parts and effort for the same end result. ME7.1 and ME7.5 are essentially the same with the exception of the wideband parts and the functions that support it so pretty much everything that is already there should support the swap. From my reading I should only need the following...

- ME7.5 ECU
- Wideband O2 sensor
- Narrowband to Wideband converter harness
- Software to support the mods

That is about it, with these parts you should be able to convert from narrowband to wideband.

Also, I don't think you want to run the wideband O2 sensor in the same (primary) position as the narrowband O2 sensor.

[Corrado_Guy]

Also, I don't think you want to run the wideband O2 sensor in the same (primary) position as the narrowband O2 sensor.

Not much is stock on my car, the first O2 sensor is for my narrowband, the second is for my wideband A/F, and there is a third one further down the downpipe that is tuned out. Given the pic, do you see a problem with this configuration...

[Corrado_Guy]

Just an update on this, I did this swap and using the harness that I bought from RaceLine and I was done in an hour. The bonus is I can also swap out my O2 sensor and go back to ME7.1 in as much time as it takes to swap the ECM and O2 sensor. The car started right up and even with big injectors it idled better than my Uni tune did using the OEM tune. I have to send my ECM dump to Eurodyne and then get playing with the tune. When I scanned the ECM I did get a '18058 - Powertrain Data Bus P1650 - 35-00 - Missing Message from Instrument Cluster' code but I can get rid of that by recoding the cluster. Otherwise it was straight forward because you are only adding 3 extra wires to the ECM harness.