Ok so i have a 79 elcamino with the 3.3 liter 200ci 6cylinder and its making one heck of a noise. A lot of times in the morning when i go out and fire it up it clacks almost like a rod knock, give it gas the noise speeds up but almost sounds like a dieseling clack. After you get going down the road the noise stops and its smooth sailing. If you slow down and you get a load on the engine (under 10-20mph or at a stoplight) the noise sometimes returnes. It gets worse when the ac is on. oil pressure is holding good and its not getting hot or any of the sort. It has new plugs, cap, rotor, and coil just as a tune up when it started. Hard to tell where its coming from but it does sound like its coming from under the car when its running but im not sure. All i have to do to get it to do it is start it and throw the ac on and put it in gear and the noise starts, even sometime with the ac off and just in gear. No noise when the car is just idling in park. Let me know what you guys think, im not really sure at this point
