vehicle lacks power at high speed and under heavy engine load conditions
HelloCustomer
This condition can be caused by a lean fuel delivery system,due to a restricted fuel filter or a failing fuel pump or excessive exhaust back pressure.Remove an O/2 sensor ,install a pressure gage,run engine at 1500 rpm,pressure should not exceed 1& 1/2 psi.If it does it is usually the catalytic converter plugged up.