1987 Ford E-Series Van V8 Two Wheel Drive Automatic
My van has no power at highway speeds. In town it does fine, but once it gets above 40 or 50mph it just doesnt have any more power. And, if I'm going up any kind of grade, about 50-55mph is all I can get out of it. What could be the problem?
Possibilities: Inspect and test all the following listed below: Oxygen sensor.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Manifold absolute pressure sensor.
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.