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BigAl P4
Joined: 06 May 2003 Posts: 2991 Location: U.K Surrey
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Posted: Sun Sep 12, 2010 12:24 pm Post subject: fuel smell |
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Hi guys,
I went all the way around a roundabout the other day fairly quick and could smell fuel.
The tank was nearly full, could I have a filler neck leak or petrol cap leak, how do I go about testing for this.
One thing I have noticed for a long time is that I no longer get the hissing sound when I take the fuel cap off to fill up, the locking mech for the fuel filler cap is also stuck but twists on and off ok.
Thanks
Alan _________________ x2 33 16v
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john 33_16v 16 Valve
Joined: 27 May 2005 Posts: 1406 Location: herts, uk
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Posted: Sun Sep 12, 2010 12:30 pm Post subject: |
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Hi,
Chuck it 'round the roundabout again and if the fuel has gone down the outside of the wing it's the cap, else if on the tyre, probably the rubber concertina between the plastic filler mouth and downpipe.
I'm guessing if you no longer get the 'whoosh' there is an air leak somewhere, most probably one of the above, or the rubber tube from the plastic downpipe to the tank could be perished, but i think this would then leak all the time.
John _________________ If it aint broke, fiddle with it until it is!
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93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue |
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BigAl P4
Joined: 06 May 2003 Posts: 2991 Location: U.K Surrey
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Posted: Sun Sep 12, 2010 12:56 pm Post subject: |
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ok
Any excuse to chuck it round a roundabout is welcome I will do it next time I fill up
When I fill up, I always fill up to the brim and haven't seen any leaks yet
Thanks
Alan _________________ x2 33 16v
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JeremyC Gold Cloverleaf
Joined: 06 Sep 2008 Posts: 583 Location: Petersfield, Hampshire
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Posted: Sun Sep 12, 2010 10:12 pm Post subject: |
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Partial hijack, I always get blowback ( ) when I fill up, where is the tank vent? _________________ '93 Black 33 1.7 16v |
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BigAl P4
Joined: 06 May 2003 Posts: 2991 Location: U.K Surrey
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Posted: Sun Sep 12, 2010 10:30 pm Post subject: |
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JC, that is normal and you should get that, as far as I know, I am not getting it.
I assume that air is allowed to be sucked into the tank as it empties, otherwise it would implode?
Am I missing anything? _________________ x2 33 16v
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JeremyC Gold Cloverleaf
Joined: 06 Sep 2008 Posts: 583 Location: Petersfield, Hampshire
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Posted: Mon Sep 13, 2010 8:45 am Post subject: |
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When I fill an almost empty tank I have to go really slowly for the first five to ten litres or the fuel just blows back out.
The tank is of course full of fuel vapour which, I guess, is less mobile than air and therefore is reluctant to get out of the way for the incoming fuel. It was my understaning the most cars had a vent to allow it to escape.
Interesting our old 33 used to do this too (just one of many 'ahhh, yes, I remember" moments when we got this one).
Surely they didn't do this from new. _________________ '93 Black 33 1.7 16v |
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paulhide P4
Joined: 20 Dec 2003 Posts: 1607 Location: Oh Beautiful Billingham
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Posted: Mon Sep 13, 2010 9:08 am Post subject: |
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I have only had problems with late 16v cars. All others fill fine. (The wonders of progress again.) _________________ Owner's Club 33 Registrar. Now from P4 & S2 1.7 QV
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JeremyC Gold Cloverleaf
Joined: 06 Sep 2008 Posts: 583 Location: Petersfield, Hampshire
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Posted: Mon Sep 13, 2010 9:23 am Post subject: |
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Our previous car was a late car, 'J' but only a 1.5ie. _________________ '93 Black 33 1.7 16v |
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BigAl P4
Joined: 06 May 2003 Posts: 2991 Location: U.K Surrey
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Posted: Mon Sep 13, 2010 10:40 am Post subject: |
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JeremyC wrote: |
(just one of many 'ahhh, yes, I remember" moments when we got this one). |
Lol
JC that sounds bad, I remember that in my 2nd ser3, was very annoying, I thought it was the pumps and used to change the angle of the handle of the pump, used to mainly do it at BP, I now only use shell fuel and don't often get it.
The fuel vapours are supposed to go from the tank to a carbon canister under the front left wing and then into the intake via the 6 legged plastic spider thingy.
Can you get your car on scantools diagnostics and do a purge to check it is working.
Mine wasn't working as the wires were corroded, after fitting new connections it purged. _________________ x2 33 16v
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JeremyC Gold Cloverleaf
Joined: 06 Sep 2008 Posts: 583 Location: Petersfield, Hampshire
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Posted: Mon Sep 13, 2010 10:55 am Post subject: |
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Is that what the thickish white pipe in the rear to front bundle is? _________________ '93 Black 33 1.7 16v |
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Admin Site Admin
Joined: 19 Feb 2003 Posts: 1223 Location: Stafford, UK
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Posted: Wed Sep 15, 2010 10:02 pm Post subject: |
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Hi
With the leak, my old Sportwagon leaked from the seam I think, and then from the seal around the fuel gauge sender unit. Neither expensive to fit, just horrible jobs where you are bound to get covered in petrol.
JeremyC wrote: |
When I fill an almost empty tank I have to go really slowly for the first five to ten litres or the fuel just blows back out. |
Think it runs up parallel with the filler pipe. My old Sprint used to do it as well, but none of my 33s have.
All the best
Keith _________________ I owe, I owe, its off to work we go.
Bimota Forum
Stafford Christmas Lights
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JeremyC Gold Cloverleaf
Joined: 06 Sep 2008 Posts: 583 Location: Petersfield, Hampshire
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Posted: Wed Sep 15, 2010 10:49 pm Post subject: |
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Hmm, need to go poking around with a bit of wire methinks. _________________ '93 Black 33 1.7 16v |
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BigAl P4
Joined: 06 May 2003 Posts: 2991 Location: U.K Surrey
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Posted: Sun Sep 26, 2010 7:42 pm Post subject: |
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The fuel all down the side of the car was a good give away lol, I just filled up and noticed that the rubber ring in the fuel cap is missing.
Anyone got one spare?? _________________ x2 33 16v
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BigAl P4
Joined: 06 May 2003 Posts: 2991 Location: U.K Surrey
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paulhide P4
Joined: 20 Dec 2003 Posts: 1607 Location: Oh Beautiful Billingham
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BigAl P4
Joined: 06 May 2003 Posts: 2991 Location: U.K Surrey
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BigAl P4
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john 33_16v 16 Valve
Joined: 27 May 2005 Posts: 1406 Location: herts, uk
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Posted: Sun Oct 17, 2010 12:49 pm Post subject: |
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BigAl wrote: |
Can someone whip out their rubber and measure it please |
Oh er mrs _________________ If it aint broke, fiddle with it until it is!
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93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue |
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BigAl P4
Joined: 06 May 2003 Posts: 2991 Location: U.K Surrey
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BigAl P4
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Admin Site Admin
Joined: 19 Feb 2003 Posts: 1223 Location: Stafford, UK
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Posted: Wed Oct 27, 2010 11:15 am Post subject: |
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Hi
It is worth checking other cars. The 75 uses the same fuel cap I think.
However there are a couple of different versions of the same cap (Alfa did a load a few years ago which didn't seem to fit that well) so not certain the seals will be the same.
All the best
Keith _________________ I owe, I owe, its off to work we go.
Bimota Forum
Stafford Christmas Lights
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BigAl P4
Joined: 06 May 2003 Posts: 2991 Location: U.K Surrey
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