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There's no doubt in my mind that a negligible loosening/shrinking of the copper and/or brass fittings at the pump must occur in all of our cars regardless of condition or miles. It should be on that checklist of inspection items unique to the 928 (along with belt tension, headlight arm linkage e-clip, etc).
For those of you new to this, it's a very easy thing to check by simply dropping the cover(at least on 87 & later cars).
It doesn't require lifting the car, just lying on the ground at the pass. side of the back bumper. Simply remove two 10mm nuts and the cover comes right off. The inside of the cover tells it all: if it isn't totally dry and looks oily or greasy, you have a leak.
I also saw some notes for the 928 that the fuel tank strainer near the fuel pump, I believe to the left of it should be changed annually! They get pretty gunked up
Last edited by Rexxus; 11-15-2021 at 11:46 PM.
Reason: Name change
check your fuel lines for peace of mind. That is always important if your lines are very old (rubber ages and if there are any issues change immediately).
y connection at canister is a problem area. After that check the fuel pump connections… those can leak at the washer if not installed and torqued properly. Most stench come from those 2 for 99% of the cases.
I had my car in to the mechanic to fix something else and thought I’d share. He took a 2 second look the rear bumper where the fuel filter was and was like yup, that’s where your fuel vapour leak is coming from. Want a quick way to diagnose if it’s in the rear? See the line there, that’s from a vapour leak. It turned out it was the copper seal as most have mentioned. He replaced it and voila.
11-15-2021, 11:42 PM
Fuel filter
