Had engine fixed by guy for blown head gasket. He tinkered a lot with the engine and timing belt and god knows what else. Anyway...the car ran very smoothly before. Now it idles a little roughly. When I put it in neutral at a stop sign I notice it. When I drive the car it's smooth as silk. After the car warms up it seems to improve a bit. Someone told me it could be a "valve", or possible something with the fuel injection. Just wondering if this could be a major problem? thanks all.
