|
|
|
|
Wales
by Joske Vermeule, September 1
|
|
|
|
|
|
|
Forums39
Topics49,896
Posts837,951
Members9,597
| |
Most Online1,063
Jun 14th, 2026
|
|
|
|
Joined: Aug 2009
Posts: 557
Talk Morgan Regular
|
OP
Talk Morgan Regular
Joined: Aug 2009
Posts: 557 |
Guys,
I’ve been trying to locate a fuel leak for a month now with no success. My garage would smell like a gas station overnight. Even when the car sits for a week without starting. I do not smell fuel while driving. Here is what I’ve tried so far:
- added UV dye into my gas tanks, inspected everything like 10 times - there are no visible leaks anywhere
- plugged fuel pump inlet/outlet, pressure tested the tanks through the vent hose: gas tanks hold 10 pounds of pressure for 5+ minutes
- changed fuel injectors
- changed all fuel lines
- changed the vent line
- plugged vents and removed the charcoal canister overnight
- sealed the gas tank cap
- sealed the airfilter
- sealed exhaust outlets
Still smells like a gas station overnight. I am at a loss here, please help!
2016 M3W, Army Green Matte/Tan Leather, 17k miles
|
|
|
|
|
Joined: May 2019
Posts: 592
Talk Morgan Regular
|
|
Talk Morgan Regular
Joined: May 2019
Posts: 592 |
That’s a toughie. Mind you I had a similar moment but thankfully discovered it was my lawn mower (also kept in the garage) petrol cap that was cracked. I’m not being funny here but given all the checks you have done, I take it that if the car isn’t in the garage then the smell in the garage disappears.
M3W Brooklands (2015)
Moody 41 (2013)
|
|
|
|
|
Joined: Feb 2018
Posts: 807 Likes: 38
Talk Morgan Regular
|
|
Talk Morgan Regular
Joined: Feb 2018
Posts: 807 Likes: 38 |
Any other vehicles parked nearby?
Steve
Late 2012 M3W
|
|
|
|
|
Joined: Mar 2014
Posts: 1,738 Likes: 56
Talk Morgan Enthusiast
|
|
Talk Morgan Enthusiast
Joined: Mar 2014
Posts: 1,738 Likes: 56 |
Guys,
I’ve been trying to locate a fuel leak for a month now with no success.
Still smells like a gas station overnight. I am at a loss here, please help!
My leak turned out to be a fractured weld where the filler tube meets the fuel tank - you had to look very carefully to see where the problem was and I could only smell fuel when I'd brimmed the tank. Some PU sealant around the weld sorted it out.
Last edited by Bunny; 19/09/20 02:26 PM.
Andy
|
|
|
|
|
Joined: Aug 2009
Posts: 557
Talk Morgan Regular
|
|
OP
Talk Morgan Regular
Joined: Aug 2009
Posts: 557 |
No other sources of gas in the garage, I would I assume the pressure test would reveal the crack in the filler neck?
2016 M3W, Army Green Matte/Tan Leather, 17k miles
|
|
|
|
|
Joined: Feb 2019
Posts: 3,857 Likes: 2
Talk Morgan Addict
|
|
Talk Morgan Addict
Joined: Feb 2019
Posts: 3,857 Likes: 2 |
What year M3W is your Alex?
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
|
|
|
|
|
Joined: Apr 2019
Posts: 488
Learner Plates Off!
|
|
Learner Plates Off!
Joined: Apr 2019
Posts: 488 |
Fuel filter can corrode under mounting bracket.
But then i guess you would have fuel spraying out when under pressure so probably not that.
Last edited by Obie; 19/09/20 05:47 PM.
|
|
|
|
|
Joined: Oct 2012
Posts: 2,822 Likes: 155
Talk Morgan Expert
|
|
Talk Morgan Expert
Joined: Oct 2012
Posts: 2,822 Likes: 155 |
Fuel filter can corrode under mounting bracket.
But then i guess you would have fuel spraying out when under pressure so probably not that. +1 on this, if you haven't already checked the body of the filter you could have a really small pinhole leak under the bracket and the filter will take a while to drop to ambient pressure from running pressure after the pump is shut down. Worth a look and it takes a tiny amount of petrol to stink out a garage.
|
|
|
|
|
Joined: Feb 2018
Posts: 367 Likes: 12
Learner Plates Off!
|
|
Learner Plates Off!
Joined: Feb 2018
Posts: 367 Likes: 12 |
My leak took a full tank to leak visibly; shop had to use a bit of pressure to find it too. I think with the less fuel, the leaked petrol would evaporate before it became visible.
It was the common cracked forward mount issue and would smell most on the back & bottom of the drivers seat (LHD).
|
|
|
|
|
Joined: May 2019
Posts: 592
Talk Morgan Regular
|
|
Talk Morgan Regular
Joined: May 2019
Posts: 592 |
How about a leaking fuel injector?
M3W Brooklands (2015)
Moody 41 (2013)
|
|
|
|
|
