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2004 Chevy Trailblazer catalytic converter

Tiny
ARON_JEREMY
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 85,000 MILES
Sometimes my car's engine runs so fast and sometimes it runs so slowly. Checks some error codes but found nothing. Mechanic recommends to removed the catalytic converter and now the engine runs fine, but service engine lights on. What shall I do?
Monday, August 17th, 2009 AT 9:59 AM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Replace the cat converter. Soundsliek it is broken interanlly and the pieces are moving around causing a restriction. Without the cat, you will always have the check engine light, the PCM monitors the efficiency of the cat, so if it isnt there, the light will come on
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Monday, August 17th, 2009 AT 10:01 AM

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