BigD54

My 07 has a little over 1000 miles and I noticed when I bought it that it jitters between 1800-3500RPM during 1/4-1/2 throttle acceleration. Its not a major hesitation, but it feels like boost kind of cuts in and out. I didnt really notice it when i test drove the car, but now that I think back it did do it when I first drove it. I also havent take the car past 5k RPM but sometimes it feels kind of flat up top. Is it supposed to pull pretty hard up top? Could it be a boost leak? Could this be a factory defect or is it normal? Thanks in advance for any input.

Wingless Wonder

iTrader: (7)

The only thing that comes to mind is the air-conditioning compressor affects idle and part-throttle response because the idle speed raises automatically to compensate for the extra load on the engine. Most guys who run track days (road course) leave their a/c off during their sessions because it affects the way the car drives. Turn your a/c or climate controls off and see if you get the same hesitation.

Never hurts to schedule an appointment at your dealership. Your car is under warranty.

BigD54

I do feel it with the a/c off. Would the dealership check for boost leaks and all that garbage? thanks for the reply.

Wingless Wonder

iTrader: (7)

The techs will first drive your car to understand what you've experienced. What procedures they follow from there, I don't know. Basically, they'll check for the obvious things first that are less labor-intensive. They know which lines to check that might cause rough running and will probably scan for trouble codes to see if anything is stored by the ECU. I'd give 'em a call. It's a new car and they'll want to keep their customers happy.