First,when its cold and i starts it up. its have a rough idling to it. in order for that to smooth out i have to drive it for a while and at a certain speed. to wear out the oil i guess. but it idle rough during engine first start,slowing down for a lighting or just in park. secondly, i hear a clicking sound coming straight from the engine.like a piston is hitting something i dont know. and i can hear a sound coming from the driver side. you can hear it better if someone driving the car. i wanna know what can cause these problems
Is it an overhead cam motor? if not most likely the hydraulic lifters. its pretty common for gm engines (all the 96 and up vortecs do it) if the piston was hitting anything it wouldnt be a clicking noise, and your knock sensor would shut down the engine. however being that it comes from just one side of the motor im almost certain its an exhaust leak at the manifold. those are your options but im certain its an exhaust leak. hope this helps
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