[9passport7]

pull the egr off and clean it with some carb cleaner (just make sure it is o2 sensor and cat safe). if it is really bad get some small wire brushes and scrub it up with the carb cleaner. hope this helps with the rough idle, if not, maybe some vacuum leaks. to check for those get a propane torch and unscrew the front part of the burner and put a couple feet of hose (fuel line, vacuum line, whatever fits) over the end so you can direct it wherever you want. Then put it on high and spray it over the intake gaskets, vacuum lines, throttle body gaskets and if the rpm jumps up then youve found your leak. hopefully it is just the egr :-)