Okay, my engine seems to make a knock type sound. It happens on start up, and keeps making the noise until I rev the engine once. Once I rev the engine it go's away at idle, but the noise is there upon acceleration. The car does not make the noise under around 1300 RPMS. I can have the car in third gear on the highway cruising at about 50 with the rpms around 1000 - 1500, and the noise is not there. As soon as I hit the gas and bring it past 1500, the noise starts. The guy at the body shop said it sounded like a cam/lifter problem. It makes a very loud tap or knock, and sometimes it seems to disapear with the longer i run the engine. Also, when I run it for a while, and go to stop at a light, the engine will drop to around 500 RPM's and sputter like it wants to die. I know it has fuel, because All I have to do is tap the gas and it revs. Could I have a bad cam and or lifters, causing the valves not to open and making the engine sputter? Also, it doesn't like to rev very high. I don't really have the money to re-build the whole engine, but I would like to fix what is wrong with it. Please tell me what you think.