Last night, after picking up my girlfriend from the airport, I parked the car in the garage and headed inside the car. About 30 minutes later I noticed a fuel smell inside the house. There's a window to one of the rooms right next to the garage that is at the driver's side of the Jag. This morning, I started up the car (COLD) and drove off. Initially I did notice the fuel smell through the air vents, but that quickly went away. When I parked, I checked the outside of the car and felt no fuel smell. I opened up the engine bay, and the fuel smell was very very faint. Faint enough that I couldn't trace it.

After reading a few threads, it seems the culprits are either the Fuel Pulsation Dampers or the Canister Purge Valve. Is there a way of diagnosing which of these is the culprit without resorting to changing parts to see if the problem goes away. I didn't see any evident fuel leakage, but on the XKR, I have to remove the supercharger to get to the passenger side pulsation dampers I really don't want to remove the blower again if it isn't the issue.

 

Only method I found was to inspect the Fuel Pulse Dampers. After parking and shutting off, I watched
as pressure went down and the Damper dripped onto manifold. The S/C may hinder your view. The Pulse Dampers are not needed any way. If defective, remove and have the holes welded closed.

 

😳 I'd feel like I would end up burning the house and the car if I attempt that. I did read that they are not needed in another thread, but didn't see why. Could you elaborate on that?

And you absolutely cannot see the pulse dampers with the SC in place.

 

I feel the Pulse Dampers are redundant due to the regulator and the PWM controlled pump. My N/A engine also has a Damper on the main line prior to the fuel rail. I did remove them by bending the tangs holding them but would have been tedious to reinstall .They have O-Rings for sealing. They do not show available for our X100 but someone on the X150 advised they were available there. Maybe for a 4.2l S Type. I've not had any problem since removed..

 

I was able to do the sniff test and it seems to be in the vicinity of the fuel rail. I think it really is the pulsation dampers.

Now to figure out how to fix it.

 

I don't know if the X100 has a fuel pressure sensor/regulator on the fuel rail like the X150 but if it is like the X150 it has a couple of O-rings which are a push fit and stop the fuel leaking out. If they are hardened or cracked you might well get some fuel leakage around the top of the engine. A new sensor or new O-rings would fix the problem.

Richard