Engine Performance problem
1991 Ford Crown Victoria V8 Two Wheel Drive Automatic 92000 miles
This car was bought from it's original owner, but had sat idle for several months.
It ran ok until it had the trans fluid changed and a new fuel filter put in.
It now loses power up hills and seemingly won't change gears after 35 mph.
I've been told it's the transmission, but I would like to know what else to check out before rebuilding the transmission.
Inspect and test all the following listed below: Oxygen sensor.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle 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.