Discussion
Tank is supposed to vent via the carbon filter in the wing, a hole in the filler cap was probably a quick fix that was done to over come some problem with this system. Of course the filler is effectively in the boot, so a build up of fumes in there is bad news.
Think I would put back a proper sealed filler cap and see what happens. Possible previous owner was alarmed by the filler cap hissing when removed, but a certain amount of that does seem normal. Mine does sometimes.
Think I would put back a proper sealed filler cap and see what happens. Possible previous owner was alarmed by the filler cap hissing when removed, but a certain amount of that does seem normal. Mine does sometimes.
You might have a fuel leak 
A favourite place is the rubber fuel hoses in the engine bay, they are at least easy to check. My previous Chim developed a leak somewhere underneath and she ended up p1ssing out half a tank of Optimax between Fleet and Bordon
Luckily she was on her way for a service.
A favourite place is the rubber fuel hoses in the engine bay, they are at least easy to check. My previous Chim developed a leak somewhere underneath and she ended up p1ssing out half a tank of Optimax between Fleet and Bordon
Luckily she was on her way for a service.dogbucket said:
Tank is supposed to vent via the carbon filter in the wing, a hole in the filler cap was probably a quick fix that was done to over come some problem with this system. Of course the filler is effectively in the boot, so a build up of fumes in there is bad news.
Think I would put back a proper sealed filler cap and see what happens. Possible previous owner was alarmed by the filler cap hissing when removed, but a certain amount of that does seem normal. Mine does sometimes.
Wot e said, get a new cap and try, a cheap temp fix.Think I would put back a proper sealed filler cap and see what happens. Possible previous owner was alarmed by the filler cap hissing when removed, but a certain amount of that does seem normal. Mine does sometimes.
Then address the venting at the carbon cannister end or blocked or squashed hose.
dogbucket said:
Tank is supposed to vent via the carbon filter in the wing, a hole in the filler cap was probably a quick fix that was done to over come some problem with this system. Of course the filler is effectively in the boot, so a build up of fumes in there is bad news.
Think I would put back a proper sealed filler cap and see what happens. Possible previous owner was alarmed by the filler cap hissing when removed, but a certain amount of that does seem normal. Mine does sometimes.
Wot e said, get a new cap and try, a cheap temp fix.Think I would put back a proper sealed filler cap and see what happens. Possible previous owner was alarmed by the filler cap hissing when removed, but a certain amount of that does seem normal. Mine does sometimes.
Then address the venting at the carbon cannister end or blocked or squashed hose.
dogbucket said:
Tank is supposed to vent via the carbon filter in the wing, a hole in the filler cap was probably a quick fix that was done to over come some problem with this system. Of course the filler is effectively in the boot, so a build up of fumes in there is bad news.
Think I would put back a proper sealed filler cap and see what happens. Possible previous owner was alarmed by the filler cap hissing when removed, but a certain amount of that does seem normal. Mine does sometimes.
Wot e said, get a new cap and try, a cheap temp fix.Think I would put back a proper sealed filler cap and see what happens. Possible previous owner was alarmed by the filler cap hissing when removed, but a certain amount of that does seem normal. Mine does sometimes.
Then address the venting at the carbon cannister end or blocked or squashed hose.
I am not convinced about the filler cap vent issue.
I do not think that venting a small amount of vapour from the filler cap would give the strong smell of petrol in the cabin that some people experience.
The filler cap, whilst under the boot lid, is actually outside the rubber seal of the lid.
Therefore, if the smell of petrol is so strong in the car, that would mean the boot seal is completely ineffective (it’s a TVR so it could be) and a significant amount of vapour is venting such that it you should be able to smell it standing by the front corner of the boot on a calm day or in the garage.
I would suspect the source of the smell is more likely to be from a fuel pipe or fitting in the boot that is perished/corroded and leaking.
The filler cap on my car appears to be a loose fit and I have not had this issue (yet).
I submit this as an observation for discussion but stand ready to be flamed in true PH fashion.
I do not think that venting a small amount of vapour from the filler cap would give the strong smell of petrol in the cabin that some people experience.
The filler cap, whilst under the boot lid, is actually outside the rubber seal of the lid.
Therefore, if the smell of petrol is so strong in the car, that would mean the boot seal is completely ineffective (it’s a TVR so it could be) and a significant amount of vapour is venting such that it you should be able to smell it standing by the front corner of the boot on a calm day or in the garage.
I would suspect the source of the smell is more likely to be from a fuel pipe or fitting in the boot that is perished/corroded and leaking.
The filler cap on my car appears to be a loose fit and I have not had this issue (yet).
I submit this as an observation for discussion but stand ready to be flamed in true PH fashion.
BrianMillar said:
I am not convinced about the filler cap vent issue.
I do not think that venting a small amount of vapour from the filler cap would give the strong smell of petrol in the cabin that some people experience.
The filler cap, whilst under the boot lid, is actually outside the rubber seal of the lid.
Therefore, if the smell of petrol is so strong in the car, that would mean the boot seal is completely ineffective (it’s a TVR so it could be) and a significant amount of vapour is venting such that it you should be able to smell it standing by the front corner of the boot on a calm day or in the garage.
I would suspect the source of the smell is more likely to be from a fuel pipe or fitting in the boot that is perished/corroded and leaking.
The filler cap on my car appears to be a loose fit and I have not had this issue (yet).
I submit this as an observation for discussion but stand ready to be flamed in true PH fashion.
Having looked at my boot I agree with you and what I originally said is in retrospect complete bI do not think that venting a small amount of vapour from the filler cap would give the strong smell of petrol in the cabin that some people experience.
The filler cap, whilst under the boot lid, is actually outside the rubber seal of the lid.
Therefore, if the smell of petrol is so strong in the car, that would mean the boot seal is completely ineffective (it’s a TVR so it could be) and a significant amount of vapour is venting such that it you should be able to smell it standing by the front corner of the boot on a calm day or in the garage.
I would suspect the source of the smell is more likely to be from a fuel pipe or fitting in the boot that is perished/corroded and leaking.
The filler cap on my car appears to be a loose fit and I have not had this issue (yet).
I submit this as an observation for discussion but stand ready to be flamed in true PH fashion.
ksminiman said:
I've tracked this down to the rubber hoses between the fixed fuel lines on the bulkhead and the fuel rails etc. (i.e. the horrible fire source of doom!)
Couple of questions: what size (diameter) are the hoses? (8mm?) and is there a recommended procedure for fitting?
I have some of this http://www.fuelpumpsonline.co.uk/8mm-fuel-hose---s...Couple of questions: what size (diameter) are the hoses? (8mm?) and is there a recommended procedure for fitting?
http://www.cbsonline.co.uk/product/FUEL_HOSE_8mm_%... what ever you do under no circumstances use the cotton over braided stuff regardless of anyone saying its OK Pirelli,Goodyear and Codan are all quality manufacturers of what your after just make sure the specs are correct 
well done for finding the cause of the smell before bigger problems occured 
Edited by Simon says on Friday 6th May 16:47
Can you tell me where they connect to the copper line,i can see the two copper lines coming up behind the off side rocker cover behind a black air duct then out the back of the duct i can see the rubber fuel hoses.Is it possible to remove the duct..My set up is slightly different because the fuel regulator is mounted near the bonnet catch.I recently had to cut off around 100mm of copper return pipe and replace back to the fuel tank..The pipe was squashed so no return back to the tank..
Keep me posted,its been a job ive wanted to do for ages..it may be a good idea to cover with heat sleeve
http://cgi.ebay.co.uk/Thermal-Velocity-Extreme-Hea...
http://cgi.ebay.co.uk/REFLECTIVE-HEAT-SHIELD-SLEEV...
http://cgi.ebay.co.uk/Thermal-Velocity-Extreme-Hea...
http://cgi.ebay.co.uk/REFLECTIVE-HEAT-SHIELD-SLEEV...
Not sure but when i cut it out and blew down it there was limited flow,squashed just under the off side botton wishbone..i had to cut it out and have a longer petrol hose further forward on the side of the chassis.I disconnected it from the regulator and there is a nice flow back to the tank..i then fitted the guage with the vac removed and it around 36 psi so seems ok..I would suggest doing the same thing and checking the return is not blocked.
Edited by SILICONE KID on Friday 6th May 23:36
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