I have a 1990 Cadillac Brougham, what could i use to flush my engine out to get rid of all the trash that i accumlate?

? Are you talking about washing your engine? A coolant flush? Fuel system flush? Brake fluid flush? Power steering flush? Emissions cleaning? That horrible oil flush stuff? Flushing your washer fluid system? Blinker fluid flush? Pick which ones you need help with and someone will let ya know how.

emission flush

Are you talking about cleaning your EGR? Not sure what you're asking.

is it possible to clean the egr valve? i looked for it and still wasnt able to find it