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Engine straining above 40 mph

Tiny
JOHN TIEN
  • MEMBER
  • 2005 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 52,000 MILES
My 2005 automatic Toyota Corolla has 52,000 miles on it. The engine makes a loud noise the faster I go as if it the RPMs are too high and it's trying to shift, but it can't. Almost as if it's in third gear, but can't shift into fourth gear. Even though the car feels like it's straining at 55 - 65 mph, there's no decrease in performance. The gas mileage is still the same before the noise started and it's been almost six months since the noise started.
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Saturday, January 22nd, 2011 AT 4:16 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the following below-Inspect and test all the following listed below:

Oxygen sensors.
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.
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Saturday, January 22nd, 2011 AT 4:38 AM

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