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fuel pump relay 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
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thunderhawk
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fuel pump relay issue

Post by thunderhawk » Tue Feb 09, 2016 9:48 am

okay so i have had some rough days trying to get this car running normally. it all started a couple weeks ago i turned car on and it shut off after runnin for about 3 seconds. started up got me to work then when i tried to get home it wouldnt start again. long story short i cleaned MAF, replaced spark plugs, cleaned IAC valve, throttle body control valve, replaced thermostat and gasket and replaced ECT sensor. When trying Ozarks fuel pump relay jump the car runs great. got a new KAE fuel pump relay from autozone and the car shuts right off again. returned the new relay to autozone and am currently using a staple to jump the relay 15 and 87. the relay is definitely not working but a staple is... so does anyone have a solution? should i try the relay from the volvo dealership or should i check the relay harness for wiring issues first? im low on cash so i think the staple going to have to get me by till my next pay check but would LOVE to know how anyone else fixed this issue. thank you so much

thunderhawk

thunderhawk
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thunderhawk

Re: fuel pump relay issue

Post by thunderhawk » Tue Feb 09, 2016 12:24 pm

okay nevermind picked up genuine volvo fuel pump relay and cars back to perfect normal. thanks anyways guys and always use genuine volvo parts is what ive learned from this mess!!!!

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theWIFES_S70
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theWIFES_S70

Re: fuel pump relay issue

Post by theWIFES_S70 » Tue Feb 09, 2016 12:53 pm

I've got a Volvo fuel pump relay coming in the mail soon... I hope to have a similar experience!
1998 Volvo S70, N/A, 5-speed, 183K
2007 Volvo S40, 2.4i, 5-speed, 97K

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BEJinFbk
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BEJinFbk

Re: fuel pump relay issue

Post by BEJinFbk » Tue Feb 09, 2016 2:33 pm

thunderhawk wrote:okay nevermind picked up genuine volvo fuel pump relay and cars back to perfect normal. thanks anyways guys and always use genuine volvo parts is what ive learned from this mess!!!!
Glad you got it fixed and
Thanks for closing the loop!
That's what MVS is all about.

BTW - http://www.matthewsvolvosite.com/forums ... =1&t=44724
'98 V70 R - Well Equipped for Life Up North... ;)

benpineapple
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Re: fuel pump relay issue

Post by benpineapple » Wed Feb 10, 2016 8:27 am

Another nail in the aftermarket coffin. I read somewhere that typically something like 1 in 10 aftermarket relays are faulty.
2006 V50 T5
2001 V70 X/C AWD

1998 V70 AWD [RIP at 249,255M]
1990 240 [SOLD at 220xxxM]

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greg850r
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Re: fuel pump relay issue

Post by greg850r » Wed Nov 30, 2016 7:15 am

Anyone know if I can drive the car 30 miles on a jumper wire? i bent a nail and got it to run but don't know if the relay would turn the pump on and off while driving.
05 Cross Country wagon
99 C70 Convertible
96 850R wagon
96 850T wagon
96 850 GLT 5spd N/A sedan
97 850R 5spd sedan
66 GTO 421SD 4spd
67 GTO 455 T400
02 Powerstroke 4x4
85 Yota 4x4
24' 454 Challenger
07 Softail Custom
02 Sportster Custom
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abscate
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abscate

Re: fuel pump relay issue

Post by abscate » Wed Nov 30, 2016 7:43 am

30 miles or 50 km is fine

At 32 miles the ECU will eject the warp core and you will have anti=matter strewn all over the highway.

(seriously, you will be fine - pull it out (HOT HOT HOT) when you get to your destination)
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Re: fuel pump relay issue

Post by greg850r » Sun Dec 04, 2016 8:09 am

So after I took it out and brought it into the house to warm up I plugged it back in and it got me there. Next morning no start again so I put the new one in and it ran. Seems they fail when cold first. I am thinking about replacing the two internal capacitors since I have too many 850 to buy a spare for every glove box. Anyone want to suggest a source? I remember seeing a thread somewhere about using ones rated at a higher voltage than the originals.
05 Cross Country wagon
99 C70 Convertible
96 850R wagon
96 850T wagon
96 850 GLT 5spd N/A sedan
97 850R 5spd sedan
66 GTO 421SD 4spd
67 GTO 455 T400
02 Powerstroke 4x4
85 Yota 4x4
24' 454 Challenger
07 Softail Custom
02 Sportster Custom
Parts cars not included

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abscate
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abscate

Re: fuel pump relay issue

Post by abscate » Sun Dec 04, 2016 8:52 am

Its cheaper to get them from a PnP - certainly check. Is the root cause of failure for fuel pump relays actually known to be the caps?
Empty Nester
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
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Link To Volvo Glossary

cn90
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Re: fuel pump relay issue

Post by cn90 » Sun Dec 04, 2016 10:04 am

Also,

If you need the car to go to work, then make a jumper with a built-in fuse and jump 15 and 87 as below:

Image


More info below:

http://www.matthewsvolvosite.com/forums ... hp?t=52252
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+

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