My 1984 Chevy S 10 when its gets over 45 mph it loses power any ideas whats up with it?
Check catalytic converter, had similar problem with my Monte Carlo, could be plugged and results in a large loss of power.
Maybe fuel filter or catalytic converternot much information to consider
soark plug is going out or gas tank is nasty
spark plug or air/fuel mix is off. does it burn oil might be the commpession