1991 Mercedes Benz 500sl Repair Question
Asked on July 25, 2010
1991 Mercedes Benz 500sl misfires
Engine Performance problem
1991 Mercedes Benz 500sl V8 Two Wheel Drive Automatic 100000 miles
why does my car misfire only after it is fully warmed up and driven a few miles?
1991 Mercedes Benz 500sl V8 Two Wheel Drive Automatic 100000 miles
why does my car misfire only after it is fully warmed up and driven a few miles?
Asked by gfreudAnswer
Replied on July 25, 2010
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.
10.Throttle position sensor.
11.Idle air control valve.
