Mazda 3 2010 automatic

Tiny
JOHNSCALZO1654
  • MEMBER
  • 2010 MAZDA 3
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 20 MILES
Car has 20K miles. Car bogs down at 40mph. It sounds like it is "blowing bubbles" under water. If I give it heavy gas the car powers through, and noise disappears. Used super for 2 tanks of gas and tried a fuel cleaner. The mpg has dropped from 30-31 to 24-26. Any suggestions?
Wednesday, January 5th, 2011 AT 4:20 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lack of acceleration, chugging, hesitating********, bogging, misfiring 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.
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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Sunday, March 13th, 2011 AT 11:43 PM

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