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head scratcher

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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RickHaleParker
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Year and Model: See Signature below.
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Re: head scratcher

Post by RickHaleParker »

Personally I would
  • 1. Run the tank low on fuel.
    2. Trace dye the remainder
    3. Get the dye up to the fuel rail.
    4. Let it sit.
    5. Then make darn sure I have not missed any leaks.
⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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sleddriver
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Year and Model: 1998 V70 T5
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Post by sleddriver »

Having read all of this, I'd suspect the fuel pump (even if new) or the installation of it. Perhaps a hose is pinched somewhere? Or a seal/o-ring is squished out internally blocking the flow of gas?

Perhaps there's a way to test the pump outside of the tank? Where you could see the flow, test the pressure, and use a long length of tubing to give it some resistance to push gas against.
1998 V70 T5 226,808 miles. Original Owner.
M1 10W-30 HM
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