1999 Volkswagen Jetta Catalytic Converter

Tiny
BGPRINCIPESSA
  • MEMBER
  • 1999 VOLKSWAGEN JETTA
Engine Performance problem
1999 Volkswagen Jetta Automatic 75000 miles

There are 2 codes showing up for my car - one is a bad catalytic converter and the other is "misfire" which I've been told implies basically a tune-up. I have been having issues with my car recently where it seems to hesitate when I accelerate but then will suddenly rush forward, and I've also noticed less power going up hills. I know these are both symptoms of a bad catalytic converter. My question is: if I get the tune-up, will this help with the other matters, and mean that I could possibly not have to replace the cat. Converter right away? Or would there already be too much damage, and it needs to be replaced?

Also: I had my car checked a few months back, and was told that there was a problem with the O2 sensor, but this code didn't come up this time. I have also read that a problem with the O2 sensor can cause the computer to misread as a cat. Converter issue.
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Wednesday, September 15th, 2010 AT 12:29 PM

1 Reply

Tiny
2CEXPT
  • EXPERT
Lack of acceleration, chugging, hesitating, jerking, bogging, misfiring etc. 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.
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Wednesday, September 15th, 2010 AT 8:04 PM

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