The only other thing may be the new Cat. I had a bad cat on a 1983 Renault Fuego and it did have the same symptoms as what you described. I'd look at your exhaust. Cat's "guts" expand with temperature, and maybe your exhaust is partially blocked. Worth looking at it.

__________________
1985 190D 2.2l Sold-to Brother-in-law
1996 Mustang 3.8l -"thinks it's a sports car"
1988 Grand Wagoneer - Sold (good home)
1995 Grand Cherokee Ltd -"What was I thinking??!!"