I’ve fixed Nissan Mirano whose issue was the ECM. This was after lots of trouble shooting. The car would accelerate and then lul for a few seconds and accelerate normally. Only from a dead stop. The ECM was bad. Now it has plenary of power and is running fine. The issue im dealing with today is a 2008 Nissan Versa with a 1.8L that seems to have good power until it’s engaged in drive or reverse. Park and neutral it’s able to rev up, but in drive or reverse the RPMs bounce around 1000 and it doesn’t want to move. Break lights work. No bad fuses. New battery. Cleaned the intake manifold. Im stumped