Go get it scanned. We can't help you unless we have some sort of hard evidence to base it off of. Ticking or Sound by o2 sensor isn't really helping. Hell...there could be a midget beating the crap out of your exhaust pipe with a hammer...sounds good enough to me right now. Like Dagger said though...that pulley isn't helping you...a 3.4" with no mods...goodnight...go pull your plugs and if any of them are bent at the top you have a chipped piston. If not...change them anyways and get some new wires too...that might fix it. If not, then change the coil packs and at last your ICM (What the coils sit on)...and that would cover the "spark" side of things that is common with this platform.
