I'm want to reset the ECU, you just unplug the negative battery terminal and step on the brakes 3 times right ? i've heard different things, some say hold down the brakes some say just pump them 3 times. does it matter ?
It doesn't really matter. Pushing the brake pedal just helps drain any static charges left in the electrical system by providing a ground through the brake lights.
I've heard that the battery needs to be unhooked for at least 15-20 minutes. But, I thought the KAM of the EEC was erased as soon as it looses a 12v sorce of power.
Every thing I have read has said to unhook the battery ground and leave it sit 15-20min. If you are in a hurry hitting the brakes might help. I always used it as a break (beer/food).
yep, the computer has capacitors which have residual charge and that needs to be discharged. after disconnecting the battery, some turn on headlights, some brake lights, etc. i turn on headlights and give it a few.