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98 s70 no start intermittently.MVSOLVED, dirty IAC

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: 98 s70 no start intermittently.MVSOLVED, dirty IAC

Post by abscate »

You still have a no crank issue, right ? Resolve that first...ignition switch, grounds, battery cable
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misha
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Year and Model: '97 850 2.5 20v
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Post by misha »

mecheng wrote:Is there a specification listed somewhere, I'm definetly above 850 rpm.
Do you have a check engine light on?

If mpg is good and if the car runs ok,i guess that you have a little vacuum leak somewhere.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
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JimBee
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Post by JimBee »

Or a big vacuum leak that isn't visible? I had similar symptoms on my '96 850. It had been running but stalling at intersections. One day, it started but died as I pulled away from the curb. After investigating the fuel pressure, etc., finally discovered the large corrugated air intake hose was blown out on the back side. The membrane that covers the wire winding is quite thin. Replacing that brought it back to normal.
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