high rpm


registered member
Sep 19, 2005
My car idle's fine and is very smooth in the lower rpms but around 4200 rpms it just starts to break up and miss real bad any help will do
Could be tons of things...as asked above what's your scan tool say? You do have a scan tool right?
I will be at dyno shop tomorrow to take a look at the car. New engine 13lbs of boost 428hp at 4200rpm before it starts to break up. Is there anything in particular I should be looking at tomorrow when looking at the data but as of wright now I haven't had a chance to take a look at any of the data.