1999 Mazda Protege Power

1999 MAZDA PROTEGE
120,000 MILES • 4 CYL • FWD • MANUAL
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THLORENZEN
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  • 1 POST
The engine lite has been on for two years but running fine. Yesterday to my disbelief the engine lite went off and it's running poorly. Insane.
When I change gears there's some hesitation. Yesterday on the highway in 5th gear the car was actually losing power and slowing down and I had to downshift into 4th?
Mar 10, 2010 at 2:13 PM
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RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
Lack of acceleration,chugging,hesitating,bogging etc. could be caused by one of the following below.

Inspect and test all the following listed below and get back with some results

Oxygen sensor.
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.
Mar 18, 2010 at 11:18 PM