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850 turbo 1994 Cranks but won't start

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
rustylites
Posts: 4
Joined: Tue Aug 21, 2012 6:19 pm
Year and Model: 850 turbo 1994
Location: lynnwood, WA

850 turbo 1994 Cranks but won't start

Postby rustylites » Tue Aug 21, 2012 6:58 pm

This car runs perfectly - except - every few days after a drive it won't restart right away. It cranks fine, just no life, not a sputter. After 10 minutes, sometimes after an hour, it will start normally and run great for another few days. Then without any symptom it happens again.
It has been to Volvo several times. It never fails when at the shop, nor does it show any codes. Reading real-time data from the OBD2 we saw the O2 sensor was slow: 4 times a minute, so we replaced it - no help. The car has 200,000 miles regular maintenance and as said earlier runs, starts perfect, until it wont start, haha (not funny)
Thanks for your advice.

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jblackburn
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Year and Model: 1998 S70 T5
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Re: 850 turbo 1994 Cranks but won't start

Postby jblackburn » Tue Aug 21, 2012 7:01 pm

My Saab did this - and then got to the point where it would intermittently die while driving.

Next time it does this, remove the fuel pump relay (103) from the upper fuse panel near the windshield. The plastic cover lifts off once you remove some screws. Jumper pins 15 and 87 and see if it will start up.
'98 S70 T5
2012 Chevy Cruze LT 6MT


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

rustylites
Posts: 4
Joined: Tue Aug 21, 2012 6:19 pm
Year and Model: 850 turbo 1994
Location: lynnwood, WA

Re: 850 turbo 1994 Cranks but won't start

Postby rustylites » Tue Aug 21, 2012 7:44 pm

Thanks I'll give it a try.

rustylites
Posts: 4
Joined: Tue Aug 21, 2012 6:19 pm
Year and Model: 850 turbo 1994
Location: lynnwood, WA

Re: 850 turbo 1994 Cranks but won't start

Postby rustylites » Sat Aug 25, 2012 9:32 pm

Update - The car finally quit again. I tried the fuel pump jumper - no luck. I have now discovered it is electrical: there is no spark. Please see the description above, if anyone has a suggestion I'd love to hear. Thanks!

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jblackburn
MVS Moderator
Posts: 13902
Joined: Sun Jun 08, 2008 9:54 pm
Year and Model: 1998 S70 T5
Location: Alexandria, VA
Flag: United States of America
Contact:

850 turbo 1994 Cranks but won't start

Postby jblackburn » Sun Aug 26, 2012 4:15 am

The cam position sensor does get flaky under high heat conditions with old age.

Check for codes as soon as possible. Sometimes these cars will store codes and not illuminate the check engine light until a condition occurs multiple times.
'98 S70 T5
2012 Chevy Cruze LT 6MT


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

rustylites
Posts: 4
Joined: Tue Aug 21, 2012 6:19 pm
Year and Model: 850 turbo 1994
Location: lynnwood, WA

Re: 850 turbo 1994 Cranks but won't start

Postby rustylites » Sun Aug 26, 2012 6:18 am

Thanks - No codes, have check several times, even while it wouldn't start. This problem is so intermittent that there is no consistency. It happens after running 5 minutes sometimes after an hour. It will restart, sometimes within 10 minutes sometimes not for hours. When runs it runs perfect, never stalls, just turn off the key, and maybe it will start - maybe not.
Our daughter wants to take the car to college this fall - Yikes!


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