1990 4Runner engine idles fine but won't rev past 2800,it surges after that. on 1990 Toyota 4Runner

Truck ran fine until I filled it with fresh fuel,good fuel.Replaced fuel pump,filter,and mass airflow sensor.Scratching my head.

by in Rocky Mount, VA on March 19, 2012
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Truck ran fine until I filled it with fresh fuel,good fuel.Replaced fuel pump,filter,and mass airflow sensor.Scratching my head.