Main Menu

1993 964 C4 Cab electrical "buzzing"

Fuel System

Vehicle Information: Model: 964 C4 Cab; Year: 1993; Body Type: Cabriolet; Total Mileage: 56K;

After several hours or so of highway or street driving, on hot days or cool, I get a buzzing sound either in or below the fuse/relay box at the right rear bulkhead of the forward trunk. It sounds like a fuel pump sound, but when the ignition is turned off and then on again without the engine on, there is no sound. Start the engine, it returns. Take it into a shop and, of course, no buzzing. Fuel pump? Relay? Or angry gremlins?

You must log in to view answers associated with technical questions. Join PCA to participate in our community.
No votes yet