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After Market Check Valve in a 2000 V70 XC a NO-GO

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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jblackburn
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Posts: 14043
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Year and Model: 1998 S70 T5
Location: Alexandria, VA
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Re: After Market Check Valve in a 2000 V70 XC a NO-GO

Post by jblackburn »

Is the regulator up there? Does the regulator keep the engine from vapor locking.
I believe so, but someone who knows the AWD models better will have to answer that question for you. There are apparently a lot of differences between an '98 FWD and the newer AWD models.

Yes, the regulator does help to keep that from happening by releasing some of the pressure (e.g. fuel that vaporizes at the hot fuel rail) back into the tank as the car sits. That's why the fuel pump re-primes when you flip on the ignition key.
'98 S70 T5
2016 Chevy Cruze Premier


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

volvolove
Posts: 52
Joined: 7 March 2011
Year and Model: 2000 v70 xc
Location: Rollinsville, co

Post by volvolove »

JRL,
If you have an aftermarket check valve on your xc that was not installed inside, or on top of the tank, I would like to know where you installed it, because I am almost sure that my problem is that I don't think I can get it before the pressure regulator. I cannot find the regulator,

JRL
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Post by JRL »

Pretty close to the tank.
No pics sorry
Mod note. Jim passed away in early 2022, his contributions to this forum are immortal, and he is missed. RIP

2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

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