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2000 S70 Cranks but won't start unless...

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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tjmonjay
Posts: 13
Joined: 4 April 2012
Year and Model: S70 2000
Location: United States

2000 S70 Cranks but won't start unless...

Post by tjmonjay »

Hey everyone,

I've been having a strange issue with my S70. The car will spin but not start until I physically go and disconnect the battery and then reconnect it after about ten seconds.

It is very strange because If I put my key in the "I" or "II" position, disconnect/reconnect the battery the car will start. However, if I do the above then take the key out and put it back in, the car will crank but not start.

Any idea what could be causing this?

Edit: The car runs perfect once I start it.

tjmonjay
Posts: 13
Joined: 4 April 2012
Year and Model: S70 2000
Location: United States

Post by tjmonjay »

Bumping for visibility still having this issue.

rmmagow
Posts: 2023
Joined: 11 March 2006
Year and Model: V70 1998
Location: Rhode Island USA
Been thanked: 2 times

Post by rmmagow »

When it is in non start mode, pull your codes. Also in non start mode, unplug the MAF before attempting to crank.
1998 V70 AWD 228K - Daily Driver
1985 Mercedes Benz 300D - 197K Off Road For Now Brakes Failed
1998 S70 135K - FOR SALE
2003 GMC Sonoma - 114K - POS
1958 Mercedes Benz 220S 66K Original and never to be restored.
2006 Saturn ION 5-Speed - 150K Son's weird little easy to fix car

tjmonjay
Posts: 13
Joined: 4 April 2012
Year and Model: S70 2000
Location: United States

Post by tjmonjay »

I have tried pulling the codes when it is in no-start mode and got nothing. When I leave work today I will try unplugging the MAF before cranking and post back however, I just replaced my MAF a month or so ago.

tjmonjay
Posts: 13
Joined: 4 April 2012
Year and Model: S70 2000
Location: United States

Post by tjmonjay »

Update:
1) No codes while in "no-start" mode.
2) Car will not start while in "no-start" regardless of the MAF being unplugged or plugged in.
3) Oddly if I unplug the MAF while the car is running I am able to start the car right up after plugging it back in as long as I keep the key in the II position.

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