mazda 3 2010 automatic

2010 MAZDA 3
20 MILES • 4 CYL • 2WD • AUTOMATIC
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JOHNSCALZO1654
  • MEMBER
  • 1 POST
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 ?
Jan 5, 2011 at 4:20 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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RASMATAZ
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 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.
Mar 13, 2011 at 11:43 PM
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