VIII patch to reset fuel trims?
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Joined: Jun 2007
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From: Lexington Park, MD
VIII patch to reset fuel trims?
Would it be feasible to create a patch for the VIII guys to reset fuel trims via ECUflash or Evoscan instead of disconnecting the battery? This would be a very helpful mod! I am not a dissasembler and at most an intermediate user for both programs... If possible can the patch be available to the 006 and 0011 roms... I don't use map switching so I have no need for the 006 rom...
Last edited by Fast_Freddie; May 21, 2009 at 09:33 AM.
The IXs reset trims on a reflash, the VIIIs only reset when you pull power from the ECU.
I've always thought resetting the trims on a map switch (in tephra's modified ROMs) would be a reasonable thing to do, since presumably you're making a significant change with the switch.
I've always thought resetting the trims on a map switch (in tephra's modified ROMs) would be a reasonable thing to do, since presumably you're making a significant change with the switch.
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From: Lattitude 48.38°, Longitude 17.58°, Altitude 146m = Slovakia, for common dude
If I have understood clearing of DTC completely, clearing CEL should reset fuel trims also, can you try sending MUT_FA, MUT_FC down the line, one of them should clear trims, cannot remember which one now, but both clear CEL, no harm testing them.
I cleared a DTC code today and the trims got reset. After a 10 minute drive I cleared DTC with no codes and the trims did not reset again. I'm thinking trims only reset if a DTC is triggered off then cleared. This was on a 03 VIII.
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From: Lattitude 48.38°, Longitude 17.58°, Altitude 146m = Slovakia, for common dude
Thanx, ^ this is what I wanted to be tested. So it seems we need a patch. I will try to find some easy way, if there is one.