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Old 07-24-2002, 02:21 PM   #1
alwu2k
Scooby Newbie
 
Member#: 16869
Join Date: Mar 2002
Vehicle:
2002 WRX
Silver

Question Is there something wrong with WRX ECU algorithm?

Ok, we'v heard and experienced so much of this: after resetting the ECU WRX runs great. Then after a few weeks it goes back to the old sluggish feeling. This makes the 'ground mod' an embarrassing joke. It looks to me a problem with the algorithm burnt into WRX's ECU. It's apparently very addaptive, but I'm not quite sure what's the objective of this addaptiveness.
Can anyone drop an explaination or solution?

Al
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Old 07-24-2002, 05:06 PM   #2
Vegumkoho
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Member#: 12059
Join Date: Nov 2001
Location: colorado springs CO
Vehicle:
2002 WRX Blue
Wish all roads were dirt

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It taylors itself to the situation you put it in. If you drive in slow commuter traffic it will learn that and be slower. If you drive fast all the time it will be faster. Sometimes resetting the ECU will give you more power sometimes it will give you less, just depends what it has learned. It is always "learning" so it is possible the same car no reset could be faster one week vs. the next. Of course I have no scientific facts to back this up so please don't put to much weight on my opinion.
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Old 07-24-2002, 06:09 PM   #3
thejean
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Join Date: Apr 2002
Chapter/Region: W. Canada
Location: Calgary, AB
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Quote:
Originally posted by Vegumkoho
It taylors itself to the situation you put it in. If you drive in slow commuter traffic it will learn that and be slower. If you drive fast all the time it will be faster. Sometimes resetting the ECU will give you more power sometimes it will give you less, just depends what it has learned. It is always "learning" so it is possible the same car no reset could be faster one week vs. the next. Of course I have no scientific facts to back this up so please don't put to much weight on my opinion.
Thats true. and you can also speed it up. Sport Compact car magazine dyno'd a stock WRX after a 110 mph run across Utah and then reset the ECU, and dyno'd 10 HP less. The ECU adjusts parameters so as to ensure it runs in its "specified ranges" for various operating conditions.
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