Great little car and I love it, but it is bogging down under 2700rpms, as soon as I get her up around 3000, she runs like a champ. I have replaced the MAF and intake hoses. Have run codes and get nothing. I see many posts about this problem and not very many fixes. Sensors, vacuum hoses, MAF, CHTS, o2 sensor, and the list goes on. HELP! this is driving me crazy. I have taken it to several different shops as well, including a very reputable Z guy of over 35 years working on Z's and he said - its nothing and your not gonna get it running any better than that. I know that is wrong because the car was running great a few months ago before this problem started. I have been trying to diagnose this and it truly is driving me a little nuts. I would appreciate any solutions anyone might have.