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evap system diagram

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

evap system diagram

Postby lowufo777 » 13 Dec 2010, 02:04

Hey All wise and knowing ones !
any clues on finding a diagram for the evap system? got a code that I had a leak (Large ) in the system. got a ck. eng. lt. can clear but comes back after a while
98 V70 135K
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Re: evap system diagram

Postby thecheat » 13 Dec 2010, 02:17

Check your evap purge valve according to my how-to and either fix or replace it.

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Re: evap system diagram

Postby jmmxc » 13 Dec 2010, 04:29

Hi lowufo777
Take a reading at my post: "Looking for the Cure for P0455, Trouble Code "

I am having the same problem as yours with my 850 GLT, 1996.
If the V70 engine is the same as an 850 in terms of the EVAP system, perhaps you can use the attached pdf files here in.
I have not been able to solve my problem yet.
I replaced the purge valve over the week end. I reset the light but the check engine light returned after 10 miles drive.
Looking at the parts listing attached, so far, I have replaced the intake hose and clamp (#14, #15). Purge Valve(#11), the elbow (#6). The long hose to the canister is fine. So far, no success. Problem seems to be further down the vac lines going to the gas pump and tank. I need to check #4 and #7a as well. I have not verified that yet.

Hope you can use the diagrams for your car. Keep posting.

EVAP 850 Non Turbo.jpg
EVAP 850 Parts Listing.jpg
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Re: evap system diagram

Postby jreed » 13 Dec 2010, 11:16

I had this same problem on my '97 855 GLT and it turned out to be the rubber connecting hoses on the roll - over valve located near the fuel filter at the back of the car. The hoses had been eaten through by a squirrel or other critter.
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94
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