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  1. #1
    LeeT's Avatar
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    1.8T Remappable ECU'S

    At what year did the B5 ECU become remappable? As i have read on here somewhere that some have to be chipped or switched out to a later ECU??

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  3. #2
    "Stick a V8 in it!"

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    Effectively none of them are flashable, they all have to be chipped.

    The early ones are extremely difficult/impossible to find the physical rom chip they require, as its long discontinued and isnt rewritable. The later ECU's use a much more common rom.

    A good tuner doing a custom map on one of these ECU's would use an Emulator in place of the rom, while he got the map nailed down, then he would burn the virtual rom to a real chip and fit it.

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  4. #3
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    Quote Originally Posted by aragorn View Post
    Effectively none of them are flashable, they all have to be chipped.

    The early ones are extremely difficult/impossible to find the physical rom chip they require, as its long discontinued and isnt rewritable. The later ECU's use a much more common rom.

    A good tuner doing a custom map on one of these ECU's would use an Emulator in place of the rom, while he got the map nailed down, then he would burn the virtual rom to a real chip and fit it.
    thanks for that, so what would be considered an early one? which years? A good tuner being someone like MRC?

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    They changed over around 1997 i think.

    You can tell just by looking at the ECU. The early ones are really chunky square oldskool looking things, and have 5 small individual plugs. The later ones are slimmer and rounded off, and have two large plugs.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
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    hmmm, ive got an early 97 on a P. I'll have to take a look when i get the car back here on Friday. If it is the early one am i knackered in the way of tuning or can i swap it out for a newer one relatively easily?

  7. #6
    "Stick a V8 in it!"

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    You can swap the later harness and ECU in without too much problem, infact i have one here if your interested :P

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
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    Yay i have a later one on a 98 lol.

    If you`re chassis number is up to 8DW100 then you have an early one, if its over that then its a late ECU

    Saying that looking at a 97 if its 8DV onwards then it goes up to 99..

    hhm chassis number is needed to work it out properly.
    Last edited by Jason.s; 8th June 2011 at 16:46.

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  9. #8
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    Quote Originally Posted by aragorn View Post
    You can swap the later harness and ECU in without too much problem, infact i have one here if your interested :P
    I could be when i have had a look to see what i have there on friday. How much are you looking for?

    Quote Originally Posted by Jason.s View Post
    Yay i have a later one on a 98 lol.

    If you`re chassis number is up to 8DW100 then you have an early one, if its over that then its a late ECU

    Saying that looking at a 97 if its 8DV onwards then it goes up to 99..

    hhm chassis number is needed to work it out properly.
    I'll get the chassis number on friday

  10. #9
    "Stick a V8 in it!"

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    I'd like £50 for the ECU and harness.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
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  11. #10
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    Quote Originally Posted by aragorn View Post
    You can swap the later harness and ECU in without too much problem, infact i have one here if your interested :P
    Quote Originally Posted by aragorn View Post
    I'd like £50 for the ECU and harness.
    fair price, i'll give you a shout when ive had a look

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    Kind of on the same subject Ive got a chipped ecu to swap over for my standard one but it run like s**t after setting it all up. Check both of them the only difference is the last 2numbers and very last letter. Would I need to get hold of the chipped ecu harness to?

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    14 hour shift my grammar is shocking. Haha

  14. #13
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    It should run fine, unless you've fitted the wrong MAF or something.

    Theres a few different MAF's depending on the exact ECU you've got.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
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    Vagcom said something about 02 sensor and MAF. But runs fine with standard ecu. For the short time it was fitted the revs were really lumpy and throwing out black smoke.

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    it could have a mafless map. but as its not set up right its overfueling

  17. #16
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    Cant do mafless on DBC cars, they have no boost sensor and narrowband lambda.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


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    It's being sorted now, the ecu that was sent had a different bosch number. A new one is being sent over now that identical to mine.

 

 

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