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fuel pump rewire

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Old Sep 19, 2011 | 09:39 AM
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Default fuel pump rewire

everyone keeps mentioning getting the fuel pump rewired and think i might get it done ( as far as i know it hasnt been done already)
how much would a garage charge to rewire a 2wd cos fuel pump? is it just a case of replacing the live that goes to the pump?
will probs be taking my car to msd in a couple of month to have some greens and a chip fitted and may just get them to do it if it isnt to expensive.
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Old Sep 19, 2011 | 09:50 AM
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the rewire kit is around 50-60 quid and you need to add fitting ontop
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Old Sep 19, 2011 | 09:51 AM
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Get onto CW Looms, they sell a rewire loom mate, very easy
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Old Sep 19, 2011 | 09:57 AM
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paul @ NYRS sells them too as do quite a few other tuners
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Old Sep 19, 2011 | 11:01 AM
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Check to see if you have 12 volts at the fuel pump.

Me and blacky did mine a few weekends ago.We took a live from the battery and used the original relay. Then we ran a new wire from the relay to the pump. Just make sure the wire you use can cope with the voltage. We doubled up the wiring to the relay from the battery and to the pump.
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Old Sep 19, 2011 | 12:10 PM
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Originally Posted by Glenn.
Check to see if you have 12 volts at the fuel pump.

Me and blacky did mine a few weekends ago.We took a live from the battery and used the original relay. Then we ran a new wire from the relay to the pump. Just make sure the wire you use can cope with the voltage. We doubled up the wiring to the relay from the battery and to the pump.
But this isn't what the problem is, it's when UNDER load, so you need to check the power whilst giving the car a bootful, ideally you want to see alternator power, but so long as you don't have less than 12V.

The earth also needs checking as with any circuit it's just as important as the live. Don't be tempted to ground on a rusty spare wheel well etc, if you do the whole rewiring job will be in vain.

Martin
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Old Sep 19, 2011 | 05:47 PM
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Fuse your new circuits as near to the power source if DIY
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Old Sep 19, 2011 | 06:02 PM
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I have a brand new, unfitted rewire kit for sale. It's very high quality. I paid Ł60 but looking for Ł40 posted
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Old Sep 19, 2011 | 06:12 PM
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i am just fitting a rewire kit i bought of ebay and the quality is poor. it uses the old pump feed to switch the relay-not good.i am using an ignition feed instead.
i have fitted a fan pump loom by paul/NYRS supplier and it is superb, wish i had bought the fuel pump loom of him as well.
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Old Sep 19, 2011 | 06:27 PM
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Originally Posted by YOREVOL
i am just fitting a rewire kit i bought of ebay and the quality is poor. it uses the old pump feed to switch the relay-not good.i am using an ignition feed instead.
i have fitted a fan pump loom by paul/NYRS supplier and it is superb, wish i had bought the fuel pump loom of him as well.
Don't use the ignition feed as this will be dangerous. The pump won't prime or cut out in the event of an accident if you do use an ignition live
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Old Sep 20, 2011 | 12:53 PM
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Originally Posted by phil69a
Don't use the ignition feed as this will be dangerous. The pump won't prime or cut out in the event of an accident if you do use an ignition live
It will as Ford supplied a live feed to the relay in the first place!

It is the ECU that completes the circuit, via the EARTH connection. Plus the inertia switch will cut the power in the event of an accident

Martin
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Old Sep 20, 2011 | 01:34 PM
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Originally Posted by martysmartie
It will as Ford supplied a live feed to the relay in the first place!

It is the ECU that completes the circuit, via the EARTH connection. Plus the inertia switch will cut the power in the event of an accident

Martin
I understand that but the rewire kit does not go to the ECU. It merely is a simple way of running a live feed from the battery and uses the old fuel pump loom to switch it on and prime if that makes sense lol
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Old Sep 20, 2011 | 05:55 PM
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Originally Posted by phil69a
I understand that but the rewire kit does not go to the ECU. It merely is a simple way of running a live feed from the battery and uses the old fuel pump loom to switch it on and prime if that makes sense lol
Sorry having re-read the post I got confused, I was referring to the OE setup, so as you were

Exactly, but the OP seems to think this is wrong, the original relay's output (87) is used to trigger the new relay (86). This is the 'done' way and is perfectly safe.

Where as at the moment as Phil says, an ignition live will not be cut in the event of accident etc.

Martin
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Old Sep 20, 2011 | 07:09 PM
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i have no intention of fitting one myself as i hate even the most basic of wiring!
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Old Sep 20, 2011 | 07:13 PM
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use the original feed to switch the relay NOT an ignition live as mentioned above as that is very dangerous
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