NefMoto > Technical > Tuning > ECU swap, weird lean condition
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Author Topic: ECU swap, weird lean condition  (Read 3912 times)
orienz
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« on: July 19, 2012, 01:11:16 PM »
Hey guys,

I put 06A906032AR ECU in place of an 06A906032HN ECU because I also swapped the engine and got this ECU from doner car. However my fuel trims are like +25% now. I guess car is for some reason running lean (according to new ECU). All harness and O2 sensors are from original AUM engine.
I also noticed that 06A906032AR ECU is 512kb instead of 1MB HN.

Does anyone know why this happens? Thanks!
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gremlin
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« Reply #1 on: July 20, 2012, 03:41:03 PM »
Quote from: orienz on July 19, 2012, 01:11:16 PM
I put 06A906032AR ECU in place of an 06A906032HN Does anyone know why this happens? Thanks!

ECUs are principially different in part of type O2S used.
HN use WBO2S as precat sensor, AR - simple level switched O2S.
First you must correctly rework wiring loom and O2S corresponding new ECU shematic.
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gremlin
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« Reply #2 on: July 20, 2012, 03:59:30 PM »
Quote from: gremlin on July 20, 2012, 03:41:03 PM
ECUs are principially different in part of type O2S used.

For reference take a look on O2S connections for both ECUs
 
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gremlin
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« Reply #3 on: July 20, 2012, 05:12:44 PM »
Quote from: gremlin on July 20, 2012, 03:41:03 PM
First you must correctly rework wiring loom and O2S corresponding new ECU shematic.

But...
IMHO it's better and more progressive to adapt HN-ECU for control swapped engine.
 
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Vdub-dub
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« Reply #4 on: July 21, 2012, 01:14:41 PM »
AUM ecu on AR ecu no good and a step back keep AUM loom and HN ecu wide band much better
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