01+ cars have a cat diag in the PCM, once it figures out you don't have a cat, say good bye to good fuel economy.
As for your first issue, its hard too say. Cleaned the throttle body recently?
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11-30-2012
01+ cars have a cat diag in the PCM, once it figures out you don't have a cat, say good bye to good fuel economy.
As for your first issue, its hard too say. Cleaned the throttle body recently?
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