Dear Blindboy,

Hope you're well. Put clean white paper towels around or under any place, from which you think fuel may leak. If fuel wets the paper, it will discolor the paper towel. That discoloration will remain, once the fuel evaporates.

I recall a post by the late "Lucid" that described replacement of the fuel pipe, from the tank to the fuel filter. If I recall correctly, replacing this pipe involves dropping the fuel tank.

This fuel pipe is part #3507548. It may still be had from a U.S.-based Volvo dealer. The cost will be about $90.

It might be easier to replace the metal pipe with fuel injection-rated hose.

I suggest checking the banjo bolts, that connect fuel pipes/hoses to the fuel filter. Those bolts are fully exposed to underside hazards. A heavily-corroded banjo bolt might "pin-hole". While the engine is running, a "pin-holed" banjo bolt will leak or spray fuel.

Hope this helps.

Yours faithfully,

Spook