1999 Contour backfiring

Tiny
GOCHALEK
  • MEMBER
  • 1999 FORD CONTOUR
  • 4 CYL
  • FWD
1999 contour backfiring when gas pedal is pressed along with chugging. Put new spark plugs in and running a little better. But still same problem.
Sunday, March 6th, 2011 AT 9:25 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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 6th, 2011 AT 9:49 PM

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