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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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Fuel Pump Fuse Blowing ConstantlyViews : 3024 Replies : 15Users Viewing This Thread : |
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Nov 23rd, 2015, 23:52 | #1 |
Brick Pilot
Last Online: Apr 10th, 2024 22:35
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Location: North Yorks
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Fuel Pump Fuse Blowing Constantly
A couple of weeks ago I was coming back from holiday, I parked up for 5 minutes and when I went to set off again the car died after approx 20 seconds.
I tried starting it and the car just kept turning over. I check the fuses and no.33 for the fuel pump had blown. I replaced it and the car ran fine and I made it home. Later the same day I went out to the car to take some relatives home, it died straight away. I checked the fuse, it had blown again. I replaced it and as soon as I turned the key to start it, the fuse blew again. Obviously it has some underlying problem! I didn't have time to check it out, and fortunately have access to another car so can get around. I called a car technician friend who came and had a look, check the fuses and they constantly blow as soon as you turn the ignition. He diagnosed a dodgy pump. I replaced the pump tonight after waiting for over a week for the correct one to arrive, checked and double checked all connections, replaced the fuse, turned the key and *pop*, the flippin' fuse blew again. As you can imagine, I am somewhat dischuffed at forking out for a brand new pump and for it not to cure the fault. I should be picking up a VIDA DICE unit tomorrow so I can check codes etc. Has anyone else had any similar problems and if so, how did you solve it? I have looked for a fuel pump relay but cannot find one, which leads me to think that there may be a control unit somewhere which my be faulty... Thanks, RWD The car is an 04 model V70R Manual
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‘87 740 Saloon B230K Previous custodian of the following '03 V70R AWD Manual '98 V70 AWD B5254T Manual, sadly no more
‘95 940 LPT Celebration Estate, '88 740 B230FK Estate, '90 340 1.7 Last edited by RWD; Nov 24th, 2015 at 00:01. Reason: Car Model info |
Nov 24th, 2015, 00:00 | #2 |
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Do you tend to drive around with the fuel gauge on nearly empty most of the time? If so, it causes the pump to run hot which can shorten their lifespan and increase current consumption.
If its a brand new pump then you wouldn't expect it to suffer any problems that a unit that has been overheating for a while could have. What the rating on the fuse you are using? From the online manual, it looks to be 15a (blue). Last edited by Simon Jones; Nov 24th, 2015 at 00:03. |
Nov 24th, 2015, 00:01 | #3 | |
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Quote:
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Nov 24th, 2015, 00:04 | #4 | |
Brick Pilot
Last Online: Apr 10th, 2024 22:35
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Quote:
When I swapped the pump tonight I noticed that the left hand side of the tank with the sender in is at a higher level than the pump side. I replaced the pump with a brand new Volvo unit. I have been replacing the fuse with the correct rating which is 15a as you said.
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‘87 740 Saloon B230K Previous custodian of the following '03 V70R AWD Manual '98 V70 AWD B5254T Manual, sadly no more
‘95 940 LPT Celebration Estate, '88 740 B230FK Estate, '90 340 1.7 Last edited by RWD; Nov 24th, 2015 at 00:15. Reason: Fuse rating |
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Nov 24th, 2015, 00:11 | #5 |
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Have you traced the wiring for a short or bad earth?
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Nov 24th, 2015, 00:12 | #6 |
Brick Pilot
Last Online: Apr 10th, 2024 22:35
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Location: North Yorks
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Thanks for the helpful comment smarty pants.
The car has been to a main dealer for most of its life, only now and again being serviced by a good local indy garage. I know the previous owner spared no expense as I have reams of paperwork. The chap I bought it off is a fellow Volvo nut and I've known him for a while - he's not the type to rip me off. No fuel pump issues were evident when I bought it, and its not something you can normally check for on a test drive. To be fair, given the price I paid I don't mind having to fix the odd issue here and there.
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‘87 740 Saloon B230K Previous custodian of the following '03 V70R AWD Manual '98 V70 AWD B5254T Manual, sadly no more
‘95 940 LPT Celebration Estate, '88 740 B230FK Estate, '90 340 1.7 |
Nov 24th, 2015, 00:14 | #7 |
Brick Pilot
Last Online: Apr 10th, 2024 22:35
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Location: North Yorks
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No, I haven't checked for a bad earth. I shall check that next. I did check the wiring to the pump and sender when I swapped the pump but couldn't see any evidence of a short or breakage in the wiring.
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‘87 740 Saloon B230K Previous custodian of the following '03 V70R AWD Manual '98 V70 AWD B5254T Manual, sadly no more
‘95 940 LPT Celebration Estate, '88 740 B230FK Estate, '90 340 1.7 |
Nov 24th, 2015, 10:16 | #8 |
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If you look inside the o/s rear wheel there is a black box that is the pump control module. There are known to suffer water ingress hence the later one the module was repositioned inside the car. Check for any bad connections. It may have thrown a fault code as well .
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Nov 24th, 2015, 11:17 | #9 |
Brick Pilot
Last Online: Apr 10th, 2024 22:35
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Oh, thanks. I shall check that tonight, I'll clean all the contacts etc. Do these have to be programmed in if I end uploading to replace it ?
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‘87 740 Saloon B230K Previous custodian of the following '03 V70R AWD Manual '98 V70 AWD B5254T Manual, sadly no more
‘95 940 LPT Celebration Estate, '88 740 B230FK Estate, '90 340 1.7 |
Nov 24th, 2015, 11:40 | #10 |
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There is just one connector on the top. No they shouldn't need to be programmed. The module is just above the fuel filter. Probably no harm in changing that as well.
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fuel pump, fuse, pem, pump electronic module, v70 |
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