2002 Toyota Corolla Performance

SIMPLYSWEET

MEMBER
2002 TOYOTA COROLLA
4 CYL
FWD
AUTOMATIC
99,820 MILES

At the 1st maintenance of the car the mechanic put in the wrong plugs in the car and I got engine problems and the o2 sensor light came on and the a/c use seem to strain the engine. I changed the sensor/plugs and now the car seems to be moving sluggish. Multiple times the mechanic has done diagnostic and the only problem was the o2sensor. I had the car for four years and has only changed oil/filter/T. Fliud/air filter/plugs and removed the catylist converter. The timing belt needs to be changed and I wonder if the car has a gas filter that needs to be changed also? What can I do to get back the best performance from the vechicle? It just feels as if the engine is being held back. HELP.

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Lack of acceleration, chugging, hesitating, bogging etc. Could be caused by one of the following below:

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 it.