Help!, engine problems? :( Options

[Rider]

Hi, I haven't posted much on this forum since I registered mainly b/c I haven't had time or money to do anything to my car, but I'd really appreciate your opinion on this. I have a 94 celi gt with 110k miles and when I drive it I can hear a metallic rattle coming from under the hood under acceleration, sometimes at low and sometimes at high RPM. This doesn't happen all the time, but it has become more frequent over the last few months to the point where now I hear it almost every time I drive the car. Has anyone had this problem or know what's wrong? Thanks

[97GTinKC]

Definitely sounds more like detonation or pinging, might try a better grade of fuel. Or some combustion chamber cleaner, may have some carbon build-up raising the compression. (or possibly check the timing, may have too much advance?)