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Engine hesitation

Tiny
PICKLEODEON
  • MEMBER
  • 1999 TOYOTA TERCEL
  • 4 CYL
  • FWD
  • MANUAL
  • 140,000 MILES
1999 Toyota tercel hesitation on reving the motor. Changed exhaust manifold O2 sensor and still have the same problem Plugs and wires are good and coils are all tested good
Monday, April 11th, 2011 AT 5:01 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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.
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 and keep testing.
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Monday, April 11th, 2011 AT 8:33 AM

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