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2000 S70 Idle Issue

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

franzium
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Year and Model: 2000 S70
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franzium

2000 S70 Idle Issue

Post by franzium » Wed Apr 10, 2019 5:59 pm

My car is having an issue when stopped, shift lever is in "D" and foot on the brake, where it has this drop in the idle by only 100 RPMs (900 to 800 then back to 900) for only a split second. And it only happens every 10-15 seconds when stopped as I described. It doesn't happen in "P" or "N" and zero problems with acceleration. Anyone have any ideas what would cause that issue only when the car is stopped, foot on the brake and car in "D"?



MDK
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MDK

Re: 2000 S70 Idle Issue

Post by MDK » Wed Apr 10, 2019 6:16 pm

You might have a vacuum leak some where. When the car is in nuetral or park there's no "load" on the engine. I'd check the brake booster or the check valve at the booster ( if it has one) or just have some one do a " smoke" test. My opinion though...MDK



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MoVolvos
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MoVolvos

Re: 2000 S70 Idle Issue

Post by MoVolvos » Fri Apr 26, 2019 12:23 am

*
MDK wrote:
Wed Apr 10, 2019 6:16 pm
You might have a vacuum leak some where. When the car is in nuetral or park there's no "load" on the engine. I'd check the brake booster or the check valve at the booster ( if it has one) or just have some one do a " smoke" test. My opinion though...MDK
Agree with MDK. Franzium you posted in 2 forums and I asked the following question in your other post. It does relate to vacuum and/or load.

Have you tried taking it out of gear into neutral and coming to a full stop to see if the idle behaves the same?


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Blessings,

BKM

1998 S70 T5 - Donated
2003 S80 T6
2003 GS300
2003 Odyssey
2008 C30 T5
2019 Atlas SE 4 Motion

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