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1999 V70XC Fuel Pressure Regulator Return Line Pinch Point

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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abscate
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Year and Model: 99: V70s S70s,05 V70
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Re: 1999 V70XC Fuel Pressure Regulator Return Line Pinch Point

Post by abscate »

Here is the FPR in real life …from Neil’s thread documenting the AWD fuel lines. The open metal nipple accepts vacuum from the evap line to regulate fuel pressure
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Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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Maestrours
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Post by Maestrours »

abscate wrote: 19 Nov 2022, 04:26

Note on the AWD cars, the excess fuel pressure is bled over to the ejector pump to extract fuel from left to right tank, on FWD cars it just returns ti the tank
Hello Abscate,

I'm facing a problem on this ejector pump; it do not work as at 30L on the dashboard, my car stops running, out of gas. Is this pump only working with fuel pressure? In this case do you know how to repair it, or what's causing this dyfunction?

thanks!

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abscate
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Joined: 17 February 2013
Year and Model: 99: V70s S70s,05 V70
Location: Port Jefferson Long Island NY
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Post by abscate »

Bonjour!

The driver side uses an ‘ ejector pump’ which has no electrical part, it just uses fuel flow to move the fuel from left to right side tank. If the fuel pump pressure starts to get low you lose that function. 30 liters is about right for failure of the ejector pump

To fix either the electric fuel pump or the ejector pump the tank can be dropped without removing the axle by lowering it, if the pipes are bad the whole axle has to come down, a 5-10 hour job
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread

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