99 ford contour

1999 FORD CONTOUR
4 CYL • 2WD • AUTOMATIC
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ALPNKCKR7
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  • 5 POSTS
I have a 99 ford contour sometimes the car sputters when im stopped at a light or something it has never died but acts like it wants to. Well last night on my home from work it starts sputtering real bad and wont let me get past around 40mph then it kicks in and takes off fine. However when i got to a stop sign it does the samething to me again and while its doing this there is a knocking sound coming from the back of the car.
Jan 29, 2011 at 5:21 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 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.
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.
Jan 29, 2011 at 5:55 PM
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ALPNKCKR7
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  • 5 POSTS
I just changed the spark plugs,spark plug wires,fuel filter and air filter a couple weeks ago mechanic told me an oxygen sensor was out but said it wouldnt hurt anything
Jan 29, 2011 at 7:12 PM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,989 POSTS
maybe the knocking sound is the muffler system ratling against the car frame?
Jan 30, 2011 at 12:26 AM
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ALPNKCKR7
  • MEMBER
  • 5 POSTS
Could be but that still doesnt explain what the prob is its been doin this a few months brought it to a mecahnic he said it just needed a tune up and also said the oxygen sensor was out but it wouldnt hurt anything. I get the car back and the problem still hasnt stopped.
Jan 30, 2011 at 5:55 AM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,989 POSTS
when this knocking sound occurs, could you get out of vehicle and attempt to track it down?
Jan 31, 2011 at 10:08 PM
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