I just had this issue. When it will only peak and stall at 2500rpm, it's in "limp mode" and I thought it was bad gas or vacuum leak when it was actually the MAF sensor was completely bad. It's a very easy simple replacement using only a screwdriver. The downside is that it's $100 at a big box auto store WITH the core. Without the core it's $70 more! If you can survive without driving it, you can order a cheaper one offline but you may end up with the same problem a couple years from now and you'd be paying the $100 anyways.So I recently lifted my car and now after about a week the engine doesnt sound to good and I believe one of my cylinders is misfiring. Why would this be? Also the power seems to stall around 2500rpms in 2 and 3 gear now. Help!!