Mudrat wroteOr the power valve. A back fire may have torn the rubber diaphragm.
I don't think the Eddies have a power valve :-|
I'd check the needle/seats and the floats... if you have too much pressure you might have to re-adjust the floats. Are you running a return line to the tank?... Also, insure the timing is correct using a timing light... it doesn't hurt to toss a vacuum ga. on for quick reference. :idea: