1995 Mazda 323 Rough running

1995 MAZDA 323
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JOHN ED
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  • 1 POST
Engine Performance problem
1995 Mazda 323 4 cyl Front Wheel Drive Automatic

Whilst the car is running cold it runs normal, but when engine is warm/hot engine runs rough, seems to be running rich, particularly at low RPM, seems to be ok at high rpm.
May 31, 2010 at 9:22 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
Probable causes of an engine running rich are as follows:

1.Fuel pressure not within specs.Can be cause by restricted fuel return line or defective fuel pressure regulator.
2.Defective Oxygen Sensors.
3.Leaking injectors.
4.Coolant temperature sensor out of calibration.
5.Restricted air intake system.
May 31, 2010 at 10:00 PM
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