high rpm

[Buger99]

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

 

[aminga]

Data?

 

[turbo nasty]

Could be tons of things...as asked above what's your scan tool say? You do have a scan tool right?

 

[Buger99]

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.

 

[Nick Micale]

I would hook up a fuel pressure gauge and watch it closely while on the dyno.

 

[Chuck Leeper]