I have a 2001 Mondeo which judders on fast acceleration-it seems to be fine if you accelerate very slowly. This started about week ago and gradually getting worse. It is petrol with an LPG conversion(fitted 2 years ago by previous owner). It has been into the garage for diagnostics but came back fine. We do not use the LPG, my only concern is to get the car running smoothly on petrol.
The only thing garage could suggest was change the spark plugs, which we have done but this was no improvement. It seems worse now not better. There is a new coil pack on it already.
I have been told it could be fuel starvation. Sorry to sound clueless, but how would we fix that?
Please is there anyone that can help or suggest a solution?
Could be caused by one of the following 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.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.
Note: If it doesn't apply disregard it and keep testing.