Engine Performance problem
2001 Ford Mustang V8 Two Wheel Drive Manual 116000 miles
bought it used, started a misfire only with a load on the engine. Not enough to send the check engine light on but u can hear it and feel the loss of horsepower. Replaced the mass airflow sensor, plugs, and injectors. Didnt fix it, it does this occasionally for however long it wants to.
Engine running rough or misfiring can be cause by the following: 1. Defective spark plug.
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.