I was driving my 03 Acura MDX and it shut off twice within 2 mins. I know the positive battery terminal is corroeded but I dont think it should turn off due to that. I began to rev the engine with the car in P and between 5 and 6 RPMs and the needle bagan to fluxuating, I did it again in N and it bagan to fluxuate again but not as bad? Is that Normal being taht the car was not in gear? It runs perfect and smooth other than that. Can the battery issue cause it to turn off? Please help.