1990 Toyota 4Runner Q&A

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

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