Engine 850: B5254S/2.4/20v: - Fuel smell

lightyears · Mar 24th, 2011, 20:33

I keep getting a smell of fuel, smells to me like unburnet neat petrol not fumes. Ive checked the all seals and lines and there doesnt appear to be a leak, it only happens on startup, both cold and hot. but doesnt seem to happen in traffic or sitting. Any idea's?

charlotte001 · Mar 24th, 2011, 21:12

Do any of the injectors need a new set of top O rings or the L shaped pipe connecting between the fuel rail and the pressure regulator? Mine quit in Sainsbury petrol station, that was fun caused a few problems.

The pipe isn't expensive

deathrider311271 · Mar 24th, 2011, 21:14

possibly a weeping injector

lightyears · Mar 24th, 2011, 21:42

is there anyway to tell if they are weeping? they just look old to me?no signs of leakage

JonYorks · Mar 24th, 2011, 23:16

Is the fuel smell only under bonnet or near rear of car?

The fuel tank will have a vent to air pipe so occasional fuel smell is normal.

lightyears · Mar 26th, 2011, 20:50

sorry for the late replys, the smell is all at the front, not near the back at all. im going to check the injector seals tomorrow ( if its dry ), would a loose joint between the mainfold and cat pipe also cause a smell? it sounds a bit rattley when i shake it

dooby · Mar 27th, 2011, 00:15

Hi,

probably wouldn't cause a petrol smell there - at least not unless the mixture is fairly rich and some unburnt fuel is making it out of the cylinder. Also not sure this would tie in with cold and hot starts, I'd expect the gap might seal once hot and either way only cold starts are likely to run rich.

That's my thinking :-) HTH, Pete

lightyears · Apr 23rd, 2011, 16:53

hi, me again, ive finally got some injector seals through courtsey of the forum supplier, can someone tell me how much i will have to take off to do these, and how to? ive figured out were 5 go, but cant suss the other 5

JimDay · Apr 23rd, 2011, 20:23

Theres a seal on the bottom of each injector & on the top where they fit into the fuel rail

deathrider311271 · Apr 23rd, 2011, 20:26

Quote:

Originally Posted by lightyears

hi, me again, ive finally got some injector seals through courtsey of the forum supplier, can someone tell me how much i will have to take off to do these, and how to? ive figured out were 5 go, but cant suss the other 5

as jim says 1 at top one at bottom, tip for u when installing the injectors use a little oil on the seals

Mar 24th, 2011, 20:33	#1
lightyears Master Member Last Online: Yesterday 20:02 Join Date: Dec 2009 Location: Blickling,Norfolk	Fuel smell I keep getting a smell of fuel, smells to me like unburnet neat petrol not fumes. Ive checked the all seals and lines and there doesnt appear to be a leak, it only happens on startup, both cold and hot. but doesnt seem to happen in traffic or sitting. Any idea's? __________________ Current Volvo 850 2.5 10V SE 1996 Volvo V70 2.5D 2000 Departed Volvo 850 T5 Turbo 'L94" 1994 Volvo 740 GLE 1990

Mar 24th, 2011, 21:12	#2
charlotte001 Premier Member Last Online: Jul 26th, 2012 11:13 Join Date: Jul 2009 Location: norwich	fuel smell Do any of the injectors need a new set of top O rings or the L shaped pipe connecting between the fuel rail and the pressure regulator? Mine quit in Sainsbury petrol station, that was fun caused a few problems. The pipe isn't expensive __________________ Previous Volvos:850 GLT 2.5 20V Auto Saloon Silver. 1997 850 T-5 Auto Estate Nautic Blue Chipped ECU, V70 TCV, Carbon Cased Filter, 17inch alloys, Rattling Engine masking the suspension rattles. Engine doesn't rattle anymore

Mar 24th, 2011, 21:42	#4
lightyears Master Member Last Online: Yesterday 20:02 Join Date: Dec 2009 Location: Blickling,Norfolk	is there anyway to tell if they are weeping? they just look old to me?no signs of leakage __________________ Current Volvo 850 2.5 10V SE 1996 Volvo V70 2.5D 2000 Departed Volvo 850 T5 Turbo 'L94" 1994 Volvo 740 GLE 1990

Mar 26th, 2011, 20:50	#6
lightyears Master Member Last Online: Yesterday 20:02 Join Date: Dec 2009 Location: Blickling,Norfolk	sorry for the late replys, the smell is all at the front, not near the back at all. im going to check the injector seals tomorrow ( if its dry ), would a loose joint between the mainfold and cat pipe also cause a smell? it sounds a bit rattley when i shake it __________________ Current Volvo 850 2.5 10V SE 1996 Volvo V70 2.5D 2000 Departed Volvo 850 T5 Turbo 'L94" 1994 Volvo 740 GLE 1990

Mar 27th, 2011, 00:15	#7
dooby Forum Support Team Last Online: Jul 5th, 2019 16:11 Join Date: Mar 2006 Location: Cambridge View Photos By: dooby	Hi, probably wouldn't cause a petrol smell there - at least not unless the mixture is fairly rich and some unburnt fuel is making it out of the cylinder. Also not sure this would tie in with cold and hot starts, I'd expect the gap might seal once hot and either way only cold starts are likely to run rich. That's my thinking :-) HTH, Pete __________________ '97MY black 855R M56H + Quaife Porsche/S60R BBK + XP8s, TD04HL-19T, 17"x8J Pegasus, THS intercooler, custom intake & RIP, Samco coolant, Koni/Nivo H&R, S60R manifold, TT-USB, Simota, IPD turbo back, IPD anti-roll bars & droplinks, IPD HT, MSD coil, Innovate LC-1, dimming mirror, Goodridge hoses, DOT5.1, V70 rear lights & handles, poly top bush & A arms & tie bar, strut brace, clear repeaters, 6k HID, catch tank, 2x rear brace

Mar 24th, 2011, 21:14	#3
deathrider311271 I've Been Banned Last Online: Jun 21st, 2022 19:26 Join Date: Mar 2010 Location: Grimsby	possibly a weeping injector

Mar 24th, 2011, 23:16	#5
JonYorks Member Last Online: Feb 14th, 2015 20:34 Join Date: Feb 2009 Location: Yorkshire	Is the fuel smell only under bonnet or near rear of car? The fuel tank will have a vent to air pipe so occasional fuel smell is normal.

Apr 23rd, 2011, 16:53	#8
lightyears Master Member Last Online: Yesterday 20:02 Join Date: Dec 2009 Location: Blickling,Norfolk	hi, me again, ive finally got some injector seals through courtsey of the forum supplier, can someone tell me how much i will have to take off to do these, and how to? ive figured out were 5 go, but cant suss the other 5 __________________ Current Volvo 850 2.5 10V SE 1996 Volvo V70 2.5D 2000 Departed Volvo 850 T5 Turbo 'L94" 1994 Volvo 740 GLE 1990

Apr 23rd, 2011, 20:23	#9
JimDay Mad Murdoch Last Online: Feb 3rd, 2021 12:15 Join Date: Nov 2008 Location: Hampshire View Photos By: JimDay	Theres a seal on the bottom of each injector & on the top where they fit into the fuel rail __________________ "If It Ain't Broke Don't Try To Fix It" Jim Day 1999 V70 2.5 T SE Auto "ME7" Caravan = 2003 Swift Charisma 550 4 Berth Last edited by JimDay; Apr 23rd, 2011 at 20:37.

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