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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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Why is it slow to start only after filling up?Views : 1154 Replies : 12Users Viewing This Thread : |
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Jan 12th, 2020, 21:59 | #11 |
Junior Member
Last Online: Aug 11th, 2023 19:23
Join Date: Oct 2013
Location: noway
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Sounds to me as though its goosed chief.
As CarlW says I would advise replace the hose, I used 6mm fuel hose it was ever so slightly too small, maybe 6.1 or 6.2 ID if that exists, take the dirty valve into halfords and try them out dont take my word for it. My car was giving a groggy start up after fuelling but an engine light for upper fuel trim at idle rpm, but no code for intake air leak so it cant have been too bad. When I said about fuel vapours flooding the engine yes, I meant drawn in by the intake manifold pressure. Also if there is a leak and your fuel trim is up to compensate that's more fuel in there when you start plus whatever is drawn in from purge so a very rich engine indeed. To test I used a heavy spring clamp on the manifold-solenoid pipe to isolate the purge system, a change in engine note was immediately noticeable indicating an air leak via the hose/valve. If you have vida/dice it also holds your hand through different tests for checking the purge system but it gave me the green light several times before I ignored it and took matters into my own hands.
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V70 2000 P80 old style, green and white. |
Jan 13th, 2020, 10:06 | #12 |
Senior Member
Last Online: Apr 10th, 2024 10:42
Join Date: Dec 2002
Location: London
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Great, thanks to all. I now understand better what should be happening and will do some more investigation with VIDA. Not sure what material the original hose is but yes, it did feel pretty cruddy so it seems sensible to change that.
Cheers Joe |
Jan 16th, 2020, 19:27 | #13 |
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Last Online: Yesterday 15:16
Join Date: Oct 2004
Location: London/West Country
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Hi Joe
While you are looking at hoses, that perished hose leads down to a semi-rigid nylon pipe which goes down beside the radiator then across to an L piece which is a push fit on the carbon canister towards the left front wing. Make sure that L piece hasnt fallen apart too. You can use a length of straight silicone hose, but I recently bought a Volvo original part 9135342 for about £4. I am still puzzled about what is causing your problem. I wonder if it would be worth testing two situations: Drive until car is warm, turn engine off for 5 minutes (about as long it takes to do a fill up), (but do not fill up) then restart. Start OK? Drive until car is warm, turn engine off for 5 minutes (about as long it takes to do a fill up), open fuel tank cap to release pressure (but do not fill up) then restart. Start OK? Hope that helps, Steve
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V70 2.5 Turbo AWD Man. 1999 Red V70 2.5 10V Auto 1998 Green C70 T 20V Auto Conv. 2001 Blue, C70 T5 Auto Conv. 2000 Blue V70 2.5 Turbo AWD Auto 1998 Green, V70 2.5 10V Auto BiFuel 1999 Red (scrapped) V70 20v Auto 1999 Green (scrapped) |
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