Engine hesitates in the speed range of 55 to 65 mph. Throbbing feeling comes from pedal.
Apr 29, 2010 at 1:08 PM
1996 Oldsmobile 98 Engine
1996 OLDSMOBILE 98
BRETT2458
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Hi brett2458, Welcome to 2carpros and TY for the donation
Lack of acceleration,stumbling,chugging,hesitating,bogging etc. could be caused by one of the following below.
Inspect and test all the following listed below and get back with some results
Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position 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.
Lack of acceleration,stumbling,chugging,hesitating,bogging etc. could be caused by one of the following below.
Inspect and test all the following listed below and get back with some results
Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position 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.
Apr 30, 2010 at 5:03 AM