04-22-2006, 12:28 AM
Filliam H. Muffman Writes.:
"The reason that the engine noise goes away is that the catalytic converter is getting coated with soot from the over rich mixture. As it plugs up it creates more backpressure and the noise goes away. (kidding?)"
You have to be kidding!
Big hole in your "Plugged Converter Theory", the sound would come back as soon as the converter lights off.
Most likely a little bit of piston rattle that goes away when it warms up.
BGnR
"The reason that the engine noise goes away is that the catalytic converter is getting coated with soot from the over rich mixture. As it plugs up it creates more backpressure and the noise goes away. (kidding?)"
You have to be kidding!
Big hole in your "Plugged Converter Theory", the sound would come back as soon as the converter lights off.
Most likely a little bit of piston rattle that goes away when it warms up.
BGnR