Recently my 1990 Jetta GLi has started to run badly. Usually when I floor it I get a rush of power. Now all I get is a really loud exhaust noise, and no power. My exhaust is leak free and my manifold/downpipe has no cracks in it. but, my catalytic converter is rattling around like crazy, or something inside it is. Is it possible that my catalytic converter died and is blocking the airflow? A friend had a similar experience with his Bronco, and it is all I can think of. What do you think?
If the cat is making a rattling sound, it has failed. Your conclusion may be correct that it is blocking exhaust flow. Replace that part (since we know it is bad) and see how things go.
Bob, The Auto Answer Man
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