S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

...So i was swapping my ecu chip, minding my own business and...

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Old Oct 23, 2001 | 02:32 PM
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Default ...So i was swapping my ecu chip, minding my own business and...

I have decided to send in my GIAC chip to have it reprogrammed into an X chip. I don't use my car everyday, but it's nice to know that if i needed it, I would be able to use it. So, when I removed the ecu, I just plunked the stock chip back where the GIAC chip was (which is where it originally was, except that now it is removeable by hand). I also figured that this would be a good chance for me to take the car in for its scheduled service and oil change.

Guess what: the car won't start with the stock chip in. I thought 'maybe i just put it in upside down', and tried again. Still no luck.

So now I'm beginning to wonder: did i screw something up by taking out the ECU for its second time? I'm also wondering if i should even risk sending my GIAC chip in to be reprogrammed. What if it doesn't work? Right now, the only chip that works is my current version of the GIAC. And i haven't even tried it since i took it out. Maybe if i put it back onto the motherboard and tried to start the car, it would now be ****ed up as well. Hmm...

Anyone else had this problem?
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Old Oct 23, 2001 | 02:37 PM
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Why oh why don't people get the spare ECU?!?
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Old Oct 23, 2001 | 02:39 PM
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Default Sounds to me like he has the stock ECU...

His car doesn't start with the stock ECU but starts with the GIAC chip. He has doubts whether or not to send in his GIAC for the X chip update.
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Old Oct 23, 2001 | 02:47 PM
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Default Does your car have the immobilizer? If its anything like the TT, you have to wait approx 48 hours

for the ECU to mate. Sounds crazy but I've heard of this.
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Old Oct 23, 2001 | 02:48 PM
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Default did you ground yourself out before touching the ECU and chip???

if you didnt---big trouble

they are static sensitive (says so on the box)

if you didnt ground out yourself you probablly shorted out the chip
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Old Oct 23, 2001 | 02:51 PM
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S4s don't have Immoblizers though.
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Old Oct 23, 2001 | 02:54 PM
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Default well, though I would ask since some TT came with them and other like mine didn't

By the way, why doesn't the S4 have immobilizers?
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Old Oct 23, 2001 | 02:54 PM
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He's physically swaping out the chips in the ECU.
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Old Oct 23, 2001 | 02:55 PM
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Default I don't know why we don't...

probably same reason we don't have memory seats and other options.
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Old Oct 23, 2001 | 02:57 PM
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Damn...never heard of somebody doing this.
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