i installed zex and i have a speratic idle now...if i disconnect the line that goes to the egr it stops. has anyone else had this problem? if so, how can i fix this? thanks

99' black svt #646 of 2760 born: 12-7-98 mods: kkm intake, mystery mod, bassani exhuast, sho shop pulleys, magnecor wires, superchip(sitting in my glove box), h & r springs, ebc gas-slotted rotors, zex, 18" giovanna kobe's