My GTV 2.0 TS phase 1, have had some strange idle and hesitation problems when accelerating. At idle it was surging up and down with a steady rythm. I tried changing the idle control valve, but it didnt help. But today when it was idling wiggled on the coil ignition connectors it disappeared? is this a common problem with this cars, bad connectors and wires to the ignition coils?