hey guys, sorry if this has come up before. well i have a street ported s4 tII, i have all emissions removed and so forth, but when i start it up the rpm loaps, 1500-2000 ish. if i mess around with tps i can get it to have a steady idle at 2000 rpm, but i pops and if i touch the gas at all it backfires, so its running really rich. anyone have any idea whats going on. please help.