mk3cn4

iTrader: (3)

I just bought a 1999 t/a with A4.

I have a PCM from my last 2002 M6 t/a.

Can I send this 2002 M6 PCM off to a mail tuner and have it work in my 99 A4 t/a or do I need a different PCM?

Thanks.

2xLS1

iTrader: (25)

Service # will be different but it will work just fine. You can flash any 99-02 F-body calibration into any 99-02 PCM if you write the entire operating system.

bjankuski

I agree!

mk3cn4

iTrader: (3)

Thank you so much!

LSX Power Tuning

iTrader: (4)

It can be flashed to work with no issues like the previous guys said. I flash alot of 99-01's over to a 2002 operating system anyways since its a better starting point and opens up a few more option with custom operating systems.

codyvette

iTrader: (24)

This++++

sicksspeed

iTrader: (2)

Would anyone care to elaborate on what is gained by flashing to the 02 operating system. Got my curiosity up. I personally have a 01. I plan on tuning in the near future myself. Hope I am not high jacking.

codyvette

iTrader: (24)

There are added tables in the 01-02 OS for fueling. once you start tuning, you will learn how to compare files and you will see the differences there.

sicksspeed

iTrader: (2)

So what your saying is 02 isn't necessarily better than 01 is but I will be able to answer my own question once get into the actual programs. Thanks for the reply.

Mike454SS

iTrader: (4)

The latest 2002 OS does give you a few more features over the latest 2001 OS, but it's much less difference than compared to 99 and 2000 OS's.

EFX_DAVE

Agree'd, upload an 02 OS and set everything to A4.

sicksspeed

iTrader: (2)

Nice thanks for the replies. Looks like I will be going with 02 then. Might as well have the best.

RonSSNova

iTrader: (3)

What about the VIN number?
Often times, or so I hear, a 99-00 VIN in an 02 OS causes a mismatch?
Many of us need to go through emissions test, the VIN needs to match the car.

LSX Power Tuning

iTrader: (4)

If your using hp tuners and the vin year doesnt match the year of the OS you will get a VIN/OS mismatch error and can not access the pcm. You'll have use efi live or another tuning software that doesn't care about the VIN.