I just replaced my airbox with a Cone type filter, and the car ran fine. But I put 89 octane in, and now when I rev the engine in neutral, I get a sound from what would be the REV-Limiter; but I am only reving upto 5 grand. It revs, and then just drops of the table, bogs down, and revs up, very weak.
what the hell is the deal, im thinking bad gas or dirty filter.
