ohhh man!!! i need ur help bad!!!!, dammit know what!! Options

[jdmart]

ok so im driving to traders village and as i was exiting a car cut me off and i slammed on my brakes well as i was making my turn i heard this wierd noise!!!! ahh hell!!! it was like a vibration noise sorta like when a spark plug goes bad and i could only hear when i gave it some gas when i put the clutch in though i cant hear it now when i got home i popped open the hood while it was still running it my car was vibrating real bad!! i noticed that where inside the box where my cams goes i noticed the little black protective box was opened a little it only does when i give it gas, i also noticed my needle to my rpms goes from 500 to 1000 back and forth sometimes it stays in 800 i did do andvance timming on my car and its set pretty high but that was like a month and a half ago. ok so it vibrates when i give it gas makes a noise like a spark plug is out it was a lil low on oil and when the car is just turned on it also vibrates i need help!!!!!!!!!!!!!!!!!