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99 V70 R rough idle after warm up and stalls

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

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Re: 99 V70 R rough idle after warm up and stalls

Post by scot850 » Mon Feb 10, 2020 10:14 am

I would look at fuel pressure. It sounds like you are losing pressure and hence the engine dies. This can be tested at the Schreader valve on the fuel rail in the engine bay.

When was the fuel filter last changed?

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Re: 99 V70 R rough idle after warm up and stalls

Post by kklepack » Wed Feb 12, 2020 6:15 am

I checked the fuel pressure and when engine runs and by pressing the nipple on fuel rail fuel sprays strong, but when engine is off there is no pressure at all. Filter seems like has been replaced not too long ago. Filter looks new.

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Re: 99 V70 R rough idle after warm up and stalls

Post by abscate » Wed Feb 12, 2020 6:47 am

An ME7 car (1999 on up) needs a solid 52 psi pressure and it should hold for 20 minutes after key off.

Check the pressure with a gauge - the squirt test isnt useful on these cars. Its common for the fuel system to fail and deliver marginal pressure, causing running problems.
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