• Tiny
  • Lawrence 2011
  • 1999 Subaru WRX
  • 4 CYL
  • AWD
  • manual
  • 144,000 miles

1999 Subaru Wrx,
my car tends to run rough and has a flat spot at low rpm's that is getting worse the more I drive. Also I replaced the leads, spark plugs and fuel injectors, I was also told it was my airflow meter my be the problem, which I replaced but did not fix the problem, do you have any ideas on what it could be?

Do you
have the same problem?
Thursday, January 27th, 2011 AT 5:26 AM

1 Reply

  • Tiny
  • rasmataz
  • Member

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.
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 it and keep testing.

Was this
Thursday, January 27th, 2011 AT 6:53 AM

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