dosnt matter if its electrical or not, it is a good ide a, and it gets you in the habit, to get the most out of the modification you reset the ECU, of course use good judgment, for instance changing a motor mount will not require to reset it
It shouldn't take more than a minute or two with the battery off, it isn't like there are some big capacitors built into the computer that hold enough to keep it powered for minutes on hand. Nevertheless, if you just disconnect your battery before you start and reconnect it when your done, that is easy enough.
Also it is good to let the engine idle for about 3-5 minutes after you reset the ECU before you take it out for a drive.
just disconnect it, its not a big thing on minor mods, but just get into the habit of it, it does make a differnce, and id do it for a good amt of time, what it will it hurt for you to have keave it off for around 15-20 minutes, just to be sure
No it's not too late. But it isn't really necessary. The ECU will eventually re-learn and adjust to the changes. With an exhaust change, it's possible you can throw a CEL within the first few minutes or miles and disconnecting will prevent that or reset it if it occurs.
Soo is it too late to reset mine if I got my cat back on earlier today?