Ignition Timing On Toyota 4AGE 20 Valve

How do I make the changes to my ignition timing permanent?
I have short-circuited the E1 and TE1 terminals on the diagnostic box, and also made sure the car was at operational temperature.
The timing adjustments stick for the day you change them, but seem to revert back to the previous setting after a day or 2.

Any help will be appreciated.
The car was in diagnostic mode (regular flashes for the entire time E1 and TE1 were short circuited).

Will it be a good idea to recheck the timing, and compensate for current advancing/retardation by advancing/retarding appropriately.

Thanks for the advice guys.

Answers for The Question

  1. toyodave
  2. yankeefan#1
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