I have done a tune up on it and it still idles rough and acts like its not getting any gas,,,,no power I have had egr valve checked at dealer it ran great for 2 days an now back the same way.anybody got any suggestions?Help please, my 1997 suzuki sidekick needs HELP

rip that f*****g thing out. who ever thought of putting the exahust gas in the intake anyway. o thats right it improves the emission.