Bubbling in fuel tank

Ian H

Junior Member
Messages
120
Finally got the 3200 running again today.
Parked up after motorway blast and while sitting stationary in the car I could hear fluid bubbling/circulating in the fuel tank.
No leaks into boot. I opened the filler cap and it vented some high pressure vapour and then the noise stopped.
Has anyone else experienced this? Presumably the tank should vent somewhere or is there a non return valve which just allows air to be drawn in?
Any thoughts greatly appreciated
Ian
 

Oishi

Member
Messages
709
I have had the same thing happen on hot days in my 4200. The tank vents thru the vapour canister, that may need replacing
 

conaero

Forum Owner
Messages
32,327
Yep carbon canister should be changed every 4 years on a GT/QP so I suspect your is ancient.

check the weight of new vs old when you do it.
 

Ian H

Junior Member
Messages
120
Hmm I do swap the canister annually but this year the Quick joint clip on the union on the top started to leak so I replaced with new hose and jubilee
are they directional - maybe I put it in upside down?
 

Oneball

Member
Messages
7,083
The canister has an in and an out. Not sure that you could get it wrong. There’s also a valve in the vac line that’s electrically controlled. Might be worth checking.
 

conaero

Forum Owner
Messages
32,327
It’s 3 pipes on the canister from memory, 2 large and a small

the large must be in and out and I can’t see it making a difference if you did put them on the wrong way round as it’s a box full of carbon balls. The small must be some sort of vent to atmos.

Suppose it could be conceivable that it’s one way valves but unlikely
 

Oneball

Member
Messages
7,083
They’ll be a baffle or something to stop liquid fuel getting into the inlet but I’m not sure Ian H is talking about the carbon can now. I think he might be talking about the fuel filter. I don’t remember quick release joints on the carbon can and you couldn’t put it in upside down.

Carbon canister from my 3200, in the wheel arch.90492
 

Ian H

Junior Member
Messages
120
Hi chaps
Sorry have been mixing things. I was indeed talking about the fuel filter in the boot (34 in diag.) which I think is a complete red herring.
The vapour canister (36 in diag.) is a whole new discovery / can of worms :)
Sounds like I need to dig mine out from under the wheel well and change - is it front passenger side?
Is the solenoid valve (35 in diag.) located adjacent to the canister or hidden elsewhere?

Eurospares have a canister kit for £1200 w.t.*** Fortunately they do just the canister and valve for ~£20 each stock permitting.

90516
 

Ian H

Junior Member
Messages
120
Ok so of course Maserati don't make the canister any more :(
It is a Fiat part # 46408670 - great.
But of course Fiat don't make the part any more.
Found a new old stock on e bay.
Thanks everyone for the help
 

Scaf

Member
Messages
3,776
Ok so of course Maserati don't make the canister any more :(
It is a Fiat part # 46408670 - great.
But of course Fiat don't make the part any more.
Found a new old stock on e bay.
Thanks everyone for the help
Buy another and stick it in the garage !
 

Gazcw

Member
Messages
4,319
Is there a way into these canisters? If is only carbon balls, activated carbon is dirt cheap.