[Scott-Ohio]

Hi GTP Dad, and thanks for the reply.

Regarding bad gas, I want to link the problem directly to that too, but I don't think either water in the gas or sediment would cause the engine run rich, let alone ultra-rich.

Instead, I would think that a clogged fuel filter would make it run lean as it starves to deliver enough fuel due to restriction in fuel filter. Would/could water in fuel lines cause such a rich condition? I wouldn't think so, but maybe I'm overlooking something. Any thoughts, anyone?

Thanks for the tip on the magnaflow cats--I'll probably go with that brand if I've ruined the cat with gas, but not until after I correct whatever is causing the high delivery of fuel--don't want to burn out another cat! I may try a length of 2" flex pipe until I get this excessive fuel issue resolved. This is not your ordinary rich fuel mixture as the fuel is just pouring through the exhaust and gas mileage has dropped at least in half. If you place your hand near tailpipe during idle it immediately becomes dampened with fuel from the heavy gas vapors!

Thanks again, I'll pass on more as the diagnosis/repair attempts progresses.

Take care, Scott