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850R No Spark

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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misha
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Joined: 7 December 2008
Year and Model: '97 850 2.5 20v
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Re: 850R No Spark

Post by misha »

e13h wrote: ↑03 May 2022, 13:24 ...Granted the IAC hums any time the battery is hooked up and not only when the key is in any specific position.
Then you have a short somewhere or relay is shorted internally.

Iac valve should make noise ONLY when key is in pos.II. or when engine is running.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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