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Fuel pump relay or fuel pump? 99 s70 t5

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

speedyt5
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Fuel pump relay or fuel pump? 99 s70 t5

Post by speedyt5 » Thu Jun 14, 2018 1:08 pm

I just bought the whole replacement kit that comes from FCP for the fuel pump assembly. I just replaced the relay and now the car is running fine. Do I bother so replace the fuel pump now since car is running fine. Maybe just hold on to the kit for a while before I send it back in case the pump goes? The guy on the phone said that the relay probably went because the pump caused it to and eventually the pump will need to be replaced, but then again I don't think I have ever replaced the relay, so why couldn't it just be the relay and nothing else? Thoughts?

tryingbe
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Re: Fuel pump relay or fuel pump? 99 s70 t5

Post by tryingbe » Thu Jun 14, 2018 1:47 pm

I wouldn't replace the fuel pump if it works fine now.
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Clemens
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Re: Fuel pump relay or fuel pump? 99 s70 t5

Post by Clemens » Thu Jun 14, 2018 2:19 pm

Send it back if you can, you can always order it again.
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scot850
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Re: Fuel pump relay or fuel pump? 99 s70 t5

Post by scot850 » Thu Jun 14, 2018 2:43 pm

Fuel pump relays work hard for a living. If the pump works fine and isn't noisy, send the pump back like Clemens suggests.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
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1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
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speedyt5
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Re: Fuel pump relay or fuel pump? 99 s70 t5

Post by speedyt5 » Thu Jun 14, 2018 3:30 pm

The question is, "How loud should the fuel pump be?" I can definitely hear it running from the rear of the car.

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misha
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Re: Fuel pump relay or fuel pump? 99 s70 t5

Post by misha » Fri Jun 15, 2018 4:40 am

With engine running...you shouldn't hear it,unless it is a performance pump or on it's way out...or you're low on fuel.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
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'78 244 DL
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erikv11
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Re: Fuel pump relay or fuel pump? 99 s70 t5

Post by erikv11 » Fri Jun 15, 2018 9:06 am

Many of the aftermarket pumps are loud and can be heard from the cabin when the engine is running. By itself that doesn't tell you much unless you know it is a A Bosch pump, those are pretty quiet on the other hand.
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abscate
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Re: Fuel pump relay or fuel pump? 99 s70 t5

Post by abscate » Sat Jun 16, 2018 6:17 am

send it back, unless you know where the low fuel light is on your car.

210k on my original fuel pump and relay now
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Re: Fuel pump relay or fuel pump? 99 s70 t5

Post by wizechatmgr » Sat Jun 16, 2018 5:08 pm

I had intermittent issues with no start that were a fuel pump relay and/or a plugged fuel filter. When the filter was disassembled there was no noticeable buildup. You can bypass the relay temporarily for troubleshooting purposes but I wouldn't drive it daily like that.

161k on orig. fuel pump. ~135k on that previous fuel pump relay.
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 - ~187k miles

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