Possible catalytic converter

2001 MAZDA PROTEGE
138,000 MILES • 2.0L • 4 CYL • 2WD
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WISCDOLLBABY
  • MEMBER
  • 1 POST
mY Vehicle vibrates and is not getting power and it is shutting off or stalls.
Feb 16, 2016 at 3:14 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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CATAFINA
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 167 POSTS
Try removing the catalytic converter and see what happens.
Feb 16, 2016 at 3:22 PM
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CARADIODOC
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 34,308 POSTS
A plugged exhaust system will cause an uncommonly smooth idle with seriously reduced engine power. You'll also hear a steady hiss from the tail pipe instead of the normal "putt putt" sound.

What you're describing is a cylinder misfire. Start with spark plugs and wires, and have the diagnostic fault codes read and recorded. The people at many auto parts stores will do that for you for free.
Feb 17, 2016 at 7:52 AM