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1990C4S 1990C4S is offline
Join Date: Sep 2009
Location: North of You
Posts: 7,018
Originally Posted by sammyg2 View Post
The one I've personally experienced was from running too lean so the cats got hot and melted.
That was on a POS ford ranger (redundant), where the primary fuel pump in the tank was really weak.
It provided enough fuel pressure for the injection at idle, but under load it would lean out and melt the two cats.
Did it twice before it was properly diagnosed, then I dumped the POS and got something better.
I saw a turbo Thunderbird lose timing, and after driving the cat was cherry red...full retard maybe, causing uncombusted fuel to burn up in the cat?
"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands."
Old 09-03-2020, 05:36 AM
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