I have a 454 mag. It starts fine and idles well for a minute. After I bring the RPM's up and hold for 10 seconds or so, all of the sudden they will drop back down. When I bring it back to idle it will either die or barely stay running. I have changed plugs, fuel/water seperator, and coil. Not sure if this is a fuel or electrical problem, I have been told both.

Is there a seperate fuel filter that I am not seeing? Any Ideas?

Thanks