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1995 Nissan Maxima Runs rough/no power

1995 NISSAN MAXIMA
194,000 MILES • 6 CYL • 2WD • AUTOMATIC
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PTIPPETT26
  • MEMBER
  • 1 POST
Car runs bad. No power. Disconnected the exhaust at the cat and car runs much better but very rich. Car also seems to run very rich with exhaust connected but there is no power. Could this be the cat converter causing the problem?
Oct 22, 2009 at 10:33 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
To rule out the Cat do a backpressure test on the exhaust system

Running rich:

Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode
Oct 22, 2009 at 10:47 AM
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