Ok.. i know this is a honda site. But im having problems with my "other car" and you guys are the only people that know what your talking about. So here goes. I recently just bought a 91 Toyota MR-2 na. It had been sitting for almost 2 years. It started right up after i changed the battery. But for like the first couple seconds after i start it, it has this knock.. After some oil gets into the engine the knocking is reduced to a pinging.. Sounds like it coming from the exhaust manifold.. and im just guessing this by the sound i think it would make but the valves are tapping too.. I gave it a oil change hoping for a quick fix but it didnt help.. I thinking its either a old belt and the timing is off, a knock sensor, or something. Im not a car whiz at all.. Thank you for your reply's..