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Old 02-06-2003, 01:12 PM   #77
TurboRex
Scooby Specialist
 
Member#: 8635
Join Date: Jul 2001
Location: Texas
Vehicle:
04 STI, 07 FXT

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My dd logs show that the ecu after a reset readily tests for proper timing. It usually is bouncing around and seems to retard with knock, hittting an upper limit at a certain rpm, or with maf changes. Since the ecu apparently does not adjust timing for knock above 5500rpm, my timing can easily get out of hand at the upper rpms. It typically will jump 3-5 degrees at 6200rpm. This timing jump can last anywhere from weeks to months. Once it settles down, you get a much smoother timing curve without big gaps in timing changes.

Does the shiv reset help with this problem? My ecu was already showing a smooth timing curve and the shiv reset didn't seem to effect it at all (why reset the ecu when timing looks good) so I can only assume it has no effect on this particular issue or that my ecu timing multiplier was already set. Too bad I can't say the same about my a/f learning. Apparently, it has to be set by another means. I guess I will have to wait another month or so and keep changing a/f to compensate.

Greg
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