2000 Firebird shaking, underpowered? Catalytic converter?

  • Thread starter Thread starter jackson5682
  • Start date Start date
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jackson5682

My car is shaking especially at an idle. From stops there is typically very little power... further down the road it will start accelerating without pressing harder on the pedal.

A code came on stating the Catalyst system was bad which most muffler shops jump the gun on and say its the cat converter. The best muffler shop in town said it didn't sound like a converter.

What else could it be?
Plugs and wires are brand new
 
Are you sure there are no other codes? How about air filter and fuel filter? Did you check the fuel pressure? Do you have dirty fuel injectors, a bottle of cleaner in the tank might help. Unless the cat is clogged why whould that cause the other symptoms?
 
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