bbrich57 said:
I know this is a doom 'n' gloom post, but don't expect it to last too long. The ECU in the 3 re-learns and compensates for it.
I was extremely happy w/this at first too, but in order for it to work consistently you have to reset the ECU about every 100 miles or so.
Actually you are wrong.
The lag was not designed into the system. The lag is a result of a VERY slight deficiency in the system, and all you do by doing this mod is strengthen the ground that is already supposed to be there. Yes an ECU can "learn" around mods, but you are not understanding how the learning process, and the goals of the ECU work. The ECU is there to (and this is grossly oversimplifying it) keep the a/f within parameters, listen for detonation< and control timing via that, in other words it gives as much timing as it can until it hears knock, then backs itself down till it doesnt hear it anymore. This is VERY largely affected by the fuel quality and air density) and keep the rest of the systems running smoothly.
If you just make a ground more solid, the ECU isnt going to really SEE any difference. All it will know is things are operating as they should have been, before you did the mod. In other words, the ecu will be blind to the fact that anything has changed. It isnt looking for the lag, so when the lag isnt there, it wont see that its gone. The bad ground isnt something the ecu is looking for to create the lag. The ecu isnt TRYING to create the lag at all. Its a result of the weak ground path.
The things an ECU can learn around, are mods that are honestly, dangerous to begin with.
Add an intake and get power and your ECU learned around it? Then you were running lean from it, and the ECU stopped you from blowing your motor up. (well, in some cases the car is programmed to run too rich to begin with, in which case you are still screwed)
Moved the timing sensor down at the crank to gain timing, and the ecu learned around it? That would mean that you gave too much timing, the ecu heard knock, and pulled timing to compensate.
Simply helping out the ground path of something on the car is NOT something the ecu will "learn around"
If anything, it would learn that now it can be slightly more agressive and give more timing. Which is often the case in cars where grounding the coilpacks yeilds power. (not all cars will see gains from that, some will). The car will often pick up a couple more hp as the ecu learns, because a stronger spark will give a very slightly higher detonation ceiling. This is all ideal situation of course.
