thanks for the tips....no, i haven't found the root cause..
i was thinking wrong about the cat / backpressure....I thought that if i eliminated the cat... it would help cool the exhaust at the header / valves etc...
the EGR is suspect.....it and the path-ways were completely blocked one of the several times i went through this..
i am running rich per the smut on the back bumper.....i need to get an OBD I tool and find out what's going on.
really appreciate the help!......gives me something to work with..
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