rattle in the engine

[19Mach69]

I have a 1994 GT and I have a rattle in the engine. It sounds like pre- ignition, but I am not sure. Does anyone know how to solve this?

 

[91LX_5L]

whats your timing at?
what fuel do you run?
where is the noise comming from?
does it happen under heavy acceleration or what?

that might help us

 

[19Mach69]

Well, I am not sure what my timing is at, but the engine rattles at random times. Mostly when I am excellerating, but not only then. I run it on regular 87, I have have tried a higher rated and that didn't help very much. I did buy the fuel system cleaner and that help a bit, but only while I used it. The knocking is coming from the engine though. Can't say where for sure because I only hear it while I am moving.

 

[Zero Signal]

Try cleaning the MAF sensor. Chances are, you are pinging. Anyone with that problem needs to clean the MAF before moving on to fixes that actually cost money.