Hi maintmechanic, Welcome to 2carpros and TY for the donation
Do you have a check engine light and when was the last tune-up?
Jerking/surging/hesitating could be caused by one of the following
Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
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 i
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Thursday, July 15th, 2010 AT 2:09 AM