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Thread: Petrol fumes

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    Petrol fumes

    Last couple of days I've detected a slight smell of petrol after shutting off the engine on the V70. My boy's car seat is on the rear OS so I park up, switch off and in those 30 seconds it takes me to get out and open his door and get his seatbelt off, I can smell the fumes. I haven't smelled it at all with the engine running (and my wife has crazy super acute sense of smell so she would have noticed any fumes inside the car weeks before I did!). I tested it yesterday, with the engine running, I had the car seat out and the seat base folder up, pulled back the foam bit under the seat and I was sniffing away in that area and down by the wheel/sill and couldn't detect anything until the engine was shut off, then had fumes for about 30 seconds.

    Questions:
    1) Is there any logical reason why fumes would only be forced out (or even an actual petrol leak) in the 30 seconds after shutting off the engine?
    2) What should I be checking?

    I've done the obvious and had a quick look under the car at the filter and surrounding area and no sign of a leak (filter is only a few years old too). Tank was filled up a week ago, and not overfilled (just to the first click on the pump, and it took the expected amount). Fuel consumption on the computer doesn't seem any worse so pretty sure there's not an actual significant leak.
    2001 V70 T5 (Manual) - The Turnip
    1999 9-5 Aero (Manual) - Sven

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    May be barking up the wrong tree, but I seem to remember something about the carbon canister only actually doing something when you switch off?
    Maybe the return line from there?

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    Gold 'N' Brown (Wednesday 9th August 2017)

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    Have your codes read as you may have a faulty Vacuum pump in the carbon canister circuit.

    Have you checked under the bonnet to make sure you've no fuel leaks around the injectors and fuel rail?
    Last edited by LeeT5; Wednesday 9th August 2017 at 09:11.

    2004 V70R 6spd manual:: Custom JRtuning REMAP @ peak 21psi :: Custom 2.75" exhaust :: New KKK24 :: WG 5.5 psi :: Tints :: IPD R gauge Rev.3 :: CFWerks door pod :: Forge CBV yellow spring :: Windowed stock housing + blue filter :: Powerflex :: Superpro Engine mount :: ATE super blue :: TW FMIC :: Eibach 5mm spacers :: Brembo 330mm drilled discs :: iMiV 'Classic'+ BT :: D2R XENARC 5500k + LED H7 + LED H3 :: Atacama :: VolvoTech CFE OBD-V1 :: See garage for full mod list

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    Not checked under the bonnet yet, but the smell definitely is only coming from around the rear OS/rear OS back seat (I really need to do another test to see if I can only smell it inside the car or if it's coming from outside only).

    I had a read about the carbon canisters and failure of the J hose last night. The symptoms people describe are just about bang on the same as mine.I need to do handbrake cables and faff about with my back box before the MOT so I'll have a snoop around the canister while I'm under there.
    2001 V70 T5 (Manual) - The Turnip
    1999 9-5 Aero (Manual) - Sven

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    I'd also pull up rear seats and take off the both pump and sender unit covers to see if there is any petrol on top of the units. Takes literally 2 mins. No need to take out the pump or the sender, just the metal cover which is held by 4 bolts.


    2004 Volvo V70R GT/Titanium Gray/Gobi do88 Intake, do88 Lower Intercooler pipe, Forge CBV with green spring, 17'Pegasus, 235/45/17 Goodyear Eagle F1 AS3

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    OK, pretty certain it's not coming from inside the car. Had a full car last night - 2 kids, wife and MIL - and none of us could smell anything inside whilst driving. I stopped and we all sat there breathing in deeply and still couldn't smell anything. Got out and could smell it around the back of the car, then it quickly disperses. I think based on what I've read that a problem with the carbon canister system seems most likely, so I'll get under and check it soon.
    2001 V70 T5 (Manual) - The Turnip
    1999 9-5 Aero (Manual) - Sven

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    My V70 (P1) had a similar issue, could smell petrol.

    Turned out to be the fuel filter (which wasn't very old) had corroded around its bracket and was letting a tiny amount of fuel out which wasn't noticeable until it was removed.
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    Quote Originally Posted by Dangerous Dave View Post
    My V70 (P1) had a similar issue, could smell petrol.

    Turned out to be the fuel filter (which wasn't very old) had corroded around its bracket and was letting a tiny amount of fuel out which wasn't noticeable until it was removed.
    Leave the ignition 'ON' (engine off) and reinspect the fuel filter again. Undo the bracket and check the whole filter.

    2004 V70R 6spd manual:: Custom JRtuning REMAP @ peak 21psi :: Custom 2.75" exhaust :: New KKK24 :: WG 5.5 psi :: Tints :: IPD R gauge Rev.3 :: CFWerks door pod :: Forge CBV yellow spring :: Windowed stock housing + blue filter :: Powerflex :: Superpro Engine mount :: ATE super blue :: TW FMIC :: Eibach 5mm spacers :: Brembo 330mm drilled discs :: iMiV 'Classic'+ BT :: D2R XENARC 5500k + LED H7 + LED H3 :: Atacama :: VolvoTech CFE OBD-V1 :: See garage for full mod list

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    Dangerous Dave (Saturday 12th August 2017)

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    There's a alloy vent pipe next to the main filler that can corrode have a good look in the wheel well to see if there's any staining.


 

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