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Old Mar 15th, 2014, 08:12 PM
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2007 Mini Cooper S fuel issues

My daughters mini stopped whilst driving and refused to restart for 10 mins, when it did it would not rev and seemed to be lacking fuel.
I got it home and noticed the fuel pump prime did not occur when inserting the fob to start. Having now removed the rear seat the fuel pump is not running for some reason?? if I get it to start it just cuts out after a few seconds.
I have discounted a High pressure pump fault as the tank pump is not running (no noise) any ideas -a wiring diagram would help.
thanks
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Old Mar 15th, 2014, 09:04 PM
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Hi ya

I think I would check the Fuses or a relay first
Fuse box inside your car fuses f43 20 amp fuel pump relay
The relay it's self is the bottom relay in that fuse box by all the connectors at the bottom.
You can test the fuel pump by removing the relay and putting in a jumping lead between two terminals but I can not remember which ones I think as you look at it 9 and 3 o'clock but don't quote me on that. And it must be fused type of jumper lead

But if you put your hand on it, insert the key fob you should feel it click. Doing it this is not always 100% positive I have had relays click but still are faulty rare but it does happen.
If they are ok you need to check the fuel pump under the back seats and see if you have voltage there I think it the two Centre pins on the plug.
I have seen water and corrosion in the plug so might be with looking at that to


Hope this helps
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Old Mar 15th, 2014, 11:36 PM
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Hi, thanks for that marque, I will try this tomorrow-I was unsure where the relay was but if looping it out proves the pump thats a good staring point.
I will let you know how things go
thanks
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Old Mar 16th, 2014, 09:51 AM
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update

I have now checked for supply on the 20 amp fuse and its fine, if I remove the bottom relay (fuel pump?)all sorts of funny warning lights come on when I refit it. still no pump prime when I insert the fob,
I was wondering if this is the pump relay as it seems to work other things as well.
Marque-could I try a supply direct to the pump? if so which wires go on what pins and which way round + -?
thanks
john
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Old Mar 16th, 2014, 10:36 AM
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update,
Put a direct supply on to pump + on pin 2(blue/white), - on pin 5(brown), pump runs fine. checked supply on connector to pump and nothing 0v. so its a 12v supply issue.
could someone confirm relay location for fuel pump????I now need to find this,and work out whats going on
thanks john
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Old Mar 16th, 2014, 12:30 PM
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In the Bentley repair manual for the Gen 2 cars
Fuse for the fuel pump relay is F43 and its a 20amp
And it says the fuel pump relay is,
Quote:
"Junction box fuse and relay panel, right front behind kick panel trim cover. (assume that means in the footwell)
Relay K96 and looks like the relay is on the back of the board at the bottom right
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Old Mar 16th, 2014, 02:41 PM
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fuel pump relay-2007 mini cooper s

Hi gents,
I am unsure were to go from here.
The relay on the front of the board seems to effect airbags etc, so is the fuel pump relay on the board at the back like the earlier R53? I am struggling to get a R56 wiring diagram which is making it worse.
thanks
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Old Mar 16th, 2014, 05:50 PM
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It would appear its at the back yes, at least thats how it seems to read to me in the manual?
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Old Mar 17th, 2014, 11:27 AM
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hi ya

check all your fuses in the engine bay fuse box to

hope these pics help :-)
Attached Files
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Old Mar 19th, 2014, 08:37 PM
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Update-I now know that pump does not run until you press the start button!
I was told it runs when you insert fob. Pump runs fine and I now have checked pressure at tank at 5 Bar so that's OK. Starts up and still stalls. very irratic to start.
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Old Mar 20th, 2014, 07:53 PM
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Update-
started to pull things apart after noticing strange noise from turbo, nuts come off inlet spindle, shaft has snapped in half so exhaust rotor spins but does not drive inlet, this has been catching housing.
All round a real mess! I then find out oil supply is poor and this is a known issue and mods are available on recall to cover supply pipe and fitting to turbo!
what else???
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Old Mar 20th, 2014, 08:12 PM
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Hopefully no bits have been sucked into the engine, or have fallen into the manifold there waiting to be sucked in, make sure you give it a good check.
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Old Mar 26th, 2014, 08:41 PM
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update

Right we are getting there! new turbo fitted after the last one snapped its spindle. cleaned every thing and rebuilt. Starts ok and sounds sweet but I am unsure how to set waste rod, can anyone help?? I have put it on but don't know if nuts are in right place as it seem to lack boost, is there a way of setting it up properly
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