Originally Posted by hozII
i was told IF you got bad valve clatter you could unplug that connector and drive it and it would relearn the computer for the octane...if it didnt then you had to run it to the stealership for an computer flash....anyone else heard/done this before?
The Octane Adjust Shorting Bar is not for relearning. It can be removed to permanently
retard the timing. The usual retard with the jumper removed is 3 degrees for most calibrations. If it's out, the spark gets the 3 degree retard; put it back in and it reverts back to the original spec.
BTW, manipulating the spark advance will not cure "valve clatter" which would be a mechanical problem in the valve train. Retarding the spark may reduce or eliminate detonation.