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#8: 07-08-2013, 08:54 AM
 
 steven1955
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Met someone today that suggested I check out the catalytic converters. If they're coming apart from age and vibration they can temporarily block the exhaust. I would think that you would have to shut off the engine to eliminate the exhaust gasses that hold the converter chunks in their blockage position, and my problem went away when driving with the engine (barely) running. Still, something to check out.