I can share my findings with smelly trunk on Jaguar XJS', which may help your case. The problem with this issue is the design. All fuel lines are made of rubber and these are not totally sealed to gas vapors. On top, all of these connections are in the trunk. The problem can be partially solved using a fuel sniffer, locating the porous hoses and replacing the worse ones with the best quality hoses you can buy. Direct OEM replacement is not a solution. The long hose coming from the left of the tank down to the surge tank is the worst offender. There are also vapor leaks through the fuel sending unit. Assemble the gasket with silicone sealant on both side of the gasket. Ideally, all hoses should be replaced with steel lines, but this is a major undertaking.
A fuel sniffer will show you that gas vapor leaks are found all over the system. It is sad that Jaguar does not offer a sound solution for this serious issue.
Thursday, October 6th, 2016 AT 6:43 AM