I am driving a Subaru Impreza 5Door 1.5R 2009. Recently when I drive on the high way at 2,000RPM and try to over take others vehicles, So I accelerate, The RPM will jump up to 5,500rpm. But Now it will cut off at 4,000 rpm or 3,000rpm.
If at 5,500rpm that's mean my fuel consumption will be at 11.5km per liter, But if it's at 3,000rpm that my fuel consumption will drop to 6km per liter.
Can anyone experience it? why? ? is the injection issues?
Once drop till 3,000-4,000rpm it is very difficult to go back to 5,000rpm until now my car still at 4,000rpm or below.
It can be ram up to 4,000rpm but it take more time like another 3-6 sec .
any one know what happen?
Thanks
