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1994 850 Turbo Wagon - Random Stalling

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

Cbruns850
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Cbruns850

1994 850 Turbo Wagon - Random Stalling

Post by Cbruns850 » Wed May 31, 2017 3:29 pm

A while ago I posted here about an issue I had with my '94 850 Wagon. It kept stalling at odd times, either when the car was cold and I had driven it 2 miles or right before I got to work (25mile drive one way), didn't matter when or where. It would randomly stall. Recently replaced the fuel filter and battery and also bought a 1994 compatible OBD II code reader. Ran it this morning and it's showing no codes whatsoever. I've replaced the air filter, done an oil change and replaced the oil filter as well. I'm pretty much at my wits end as to what is wrong, I do know the turbo needs to be replaced within the next 6 months, but not sure if that would cause an issue. Any help is greatly appreciated!

cuhfs
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cuhfs

Re: 1994 850 Turbo Wagon - Random Stalling

Post by cuhfs » Wed May 31, 2017 3:45 pm

Fuel relay?? worth a shot
95 850 Sedan Auto Trans
98 V70 Manual Trans
01 C70 Manual Trans
03 XC70 Auto
04 C70 Auto
06 XC90 Auto (ORE)
06 S80
12 S60
96 850 Wagon Manual Trans (parts car)

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wizechatmgr
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Re: 1994 850 Turbo Wagon - Random Stalling

Post by wizechatmgr » Wed May 31, 2017 3:55 pm

+1 on Fuel relay and try installing a multimeter setup to measure current across your fuel injection fuse. See how much juice that pump is pulling at idle.

When it stalls out does it still sound like the pump is running for a second or two after the car dies? Do you still have instruments when it cuts out?
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~190k miles

Cbruns850
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Cbruns850

Re: 1994 850 Turbo Wagon - Random Stalling

Post by Cbruns850 » Wed May 31, 2017 4:07 pm

That definitely could be, would the fuel pump matter at all?

Cbruns850
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Re: 1994 850 Turbo Wagon - Random Stalling

Post by Cbruns850 » Wed May 31, 2017 4:10 pm

wizechatmgr wrote:
Wed May 31, 2017 3:55 pm
+1 on Fuel relay and try installing a multimeter setup to measure current across your fuel injection fuse. See how much juice that pump is pulling at idle.

When it stalls out does it still sound like the pump is running for a second or two after the car dies? Do you still have instruments when it cuts out?
I still have instruments when it stalls, and I have heard the pump keep going after it stalls. I'm also trying to DIY on this so havnt used a multimeter setup.

Cbruns850
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Cbruns850

Re: 1994 850 Turbo Wagon - Random Stalling

Post by Cbruns850 » Wed May 31, 2017 4:48 pm

wizechatmgr wrote:
Wed May 31, 2017 3:55 pm
+1 on Fuel relay and try installing a multimeter setup to measure current across your fuel injection fuse. See how much juice that pump is pulling at idle.

When it stalls out does it still sound like the pump is running for a second or two after the car dies? Do you still have instruments when it cuts out?

Cbruns850
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Cbruns850

Re: 1994 850 Turbo Wagon - Random Stalling

Post by Cbruns850 » Wed May 31, 2017 4:59 pm

Just to double check, the fuel relay is this?
IMG_3352.JPG
IMG_3352.JPG (28.25 KiB) Viewed 745 times

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wizechatmgr
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Re: 1994 850 Turbo Wagon - Random Stalling

Post by wizechatmgr » Wed May 31, 2017 7:27 pm

Not sure on your year but mine on the 99 looks like that plus 2 small terminals.

Would suggest just pulling yours out and jumpering it to see if you get a difference. Robert's channel has a good video on that.
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~190k miles

Cbruns850
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Cbruns850

Re: 1994 850 Turbo Wagon - Random Stalling

Post by Cbruns850 » Fri Jun 02, 2017 11:01 am

Found the part, and ordered it. Fingers crossed this is the issue! Thanks for your help. Hopefully no further issues

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