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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

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speedyt5
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Fuel pump relay or fuel pump? 99 s70 t5

Post by speedyt5 »

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

Post by tryingbe »

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 »

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 »

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.
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speedyt5
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Re: Fuel pump relay or fuel pump? 99 s70 t5

Post by speedyt5 »

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 »

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

Post by erikv11 »

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

Post by abscate »

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 »

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.
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1999 V70 XC AWD - ~193k miles
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