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C30 / S40 & V50 '04-'12 / C70 '06-'13 General Forum for the P1-platform C30 / S40 / V50 / C70 models |
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Noisy fuel pump, a real puzzler...Views : 2527 Replies : 9Users Viewing This Thread : |
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Jun 16th, 2017, 06:07 | #1 |
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Noisy fuel pump, a real puzzler...
Hi,
Car is 2004 V50 2.4 (140 bhp) 180k km. I had a noisy fuel pump which was making a weird sound after the car has warmed up fully. The sound was a combination of a whirling noise as well as a high pitched squealing noise. After replacing the pump (same Bosch part as before, perfect fit) the squealing noise is gone, but when the car is driven for a while everything gets hot, it starts to make the whirling sound again. It's like the pump is having a hard time pumping the gasoline up, I'm worried it will fry it again... I recorded the sound: https://youtu.be/qzbYzFBaUag Anybody has any idea what to look for? Should i change the carbon canister? Or the evap valve? Could something cause a restriction on the return of the outgoing fuel line when the engine gets hot? Any help is greatly appreciated, i'm getting very frustrated about this. Cheers |
Jan 2nd, 2018, 08:44 | #2 |
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SOLVED!!!
Hi All, I just wanted to give an update on this, should anybody experience the same problem. Quick summary Symptom: When the car got warm after about ~30 minutes, there was a harsh sound coming from the fuel pump (high pitched noise and also a swirling sound). Also I got P0172 CEL code: system too rich bank 1. It was intermittent, sometimes the CEL went off, sometimes came back. Resolution: First try: Changed the fuel pump to the OE BOSCH unit. Did not solve the problem, the high pitched noise went away but the swirling sound stayed. Probably the old fuel pump's motor was already damaged/burnt a bit, that's why it also had a high pithced noise. Second try: (thanks to a youtube comment) Changed the Fuel Pressure Sensor (https://www.ebay.com/p/VOLVO-Sensor-...sch/1947041485) It took around 10 minutes (https://www.youtube.com/watch?v=zZkBeSE9kwE) and the problem was solved. Root cause: The fuel pressure sensor was malfunctioning after warm-up, when the pressure was also rising due to the elevated temperature. It sent a pressure reading too low to the ECU, which didn't let enough pressure back to the return line, so the fuel pressure was actually higher than the factory value. This caused the injectors to let more fuel in the cylinders, that has triggered a "system too rich" CEL code. Also, because of the increased pressure, the fule pump had to work very hard because it was pumping the fuel against a much higher pressure than it should. I hope this write-off is helpful, and will help to anybody that is experiencing similar problems. It was a real puzzler for me, I'm happy that it's solved now. Br, Balint Last edited by Crazylachesus; Jan 2nd, 2018 at 08:48. |
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May 15th, 2020, 11:31 | #3 |
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I've just registered on the forum to find out about this issue with my 2007 2.4i. Glad you got your sorted and thanks for posting.
I have replaced my OE fuel pump with a genuine Bosch replacement. Quite expensive as it involved dropping the tank. So disappointed when the noise returned, usually after 20-30 mins gentle driving. I'll try the pressure sensor and report back. Fingers crossed it works for me as I like the car and have already sunk too much money into it! |
Jun 4th, 2020, 09:42 | #4 |
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To confirm - replacing the fuel pressure sensor worked! No complaining or buzzing from the fuel pump anymore.
I didn't read any codes but I am assuming it was the same issue at the OP. Relieved. |
Jun 4th, 2020, 11:13 | #5 |
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these sensors have been a problem since they came out on the R models .
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My comments are only based on my opinions and vast experience . |
Oct 15th, 2023, 17:26 | #6 |
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Last Online: May 8th, 2024 09:52
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Bringing this thread back to life as i have the same symptoms but no fault code .
I get the noise after about 20-30 mins driving so have ordered a new Bosch sensor which should arrive this week. Anybody else had this problem or can shed more light on it.
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2006 S40 2.4 SE Auto. Ruby Red. 83K Miles Some previous cars include: Jaguar x type: Mazda 6 : Mazda 626: Ford Sierra 2.0: Toyota Celica ST 1600 : Hillman Avenger: Triumph Spitfire: Oh and a Volvo 340 GL 1984 company car from new. |
Nov 17th, 2023, 11:49 | #7 |
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Fixed Update
Just to confirm that a new fuel rail pressure sensor cured the noise coming from the in tank pump when warm.
Bosch sensor £50 from genuine supplier against £250 required by Volvo.
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2006 S40 2.4 SE Auto. Ruby Red. 83K Miles Some previous cars include: Jaguar x type: Mazda 6 : Mazda 626: Ford Sierra 2.0: Toyota Celica ST 1600 : Hillman Avenger: Triumph Spitfire: Oh and a Volvo 340 GL 1984 company car from new. |
Nov 17th, 2023, 22:33 | #8 | |
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Quote:
i did the same, Bosch unit but for a different fault, so far so good
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940s - 2l / 92 < gone&missed s401.8 xs auto <gone >V50 2.4SE Geartronic aka "the new money pit" "skyship007 has now been successfully added to your ignore list. "." |
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Nov 18th, 2023, 13:22 | #9 |
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I had no fault codes ( i have Vida ) just the noise from the pump after 20 mins of driving which at first i thought was the pas pump.
Just for any interested people, i got mine from Opie Oil in Cornwall. They now seem to sell a lot more than just oil. I even spotted drive shafts on their site. Glad you sorted your fault.
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2006 S40 2.4 SE Auto. Ruby Red. 83K Miles Some previous cars include: Jaguar x type: Mazda 6 : Mazda 626: Ford Sierra 2.0: Toyota Celica ST 1600 : Hillman Avenger: Triumph Spitfire: Oh and a Volvo 340 GL 1984 company car from new. Last edited by MDS40; Nov 18th, 2023 at 13:25. |
Nov 18th, 2023, 17:47 | #10 | |
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Quote:
i was getting a DIM message about the fuel pressure and vida codes for that sensor, 10 min? job ,even including the pull fuse etc steps best bit, i Didnt drop the end cap for the pressure relief valve
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940s - 2l / 92 < gone&missed s401.8 xs auto <gone >V50 2.4SE Geartronic aka "the new money pit" "skyship007 has now been successfully added to your ignore list. "." |
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2.4, 2.4i, fuel pump, solved, v50 |
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