Question about Citroen C5

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The feul pump is not working,there is no feul in commin rail,the pump is not pumping feul,what can it be?

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Check the main relay and fuse.

Posted on Apr 26, 2015

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Hi,if you have already found out that the pump is not working,
you need to find the pump which most of the time its under the car near the fuel tank,you need to check the wires that go to it and find out if there is any power to it,if not check the fuse if ok,get a 12volt battery and cnnect to pump it self if ok,then problem in the wireing some where,but if one of the above is not working replace.
but if fuse is blown still check pump as it could be a falty pump that made fuse blow.
hope this was some help.

Posted on Apr 18, 2015

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1 Answer

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Someone will need to check the circuit at the pump to see if it is getting power from the relay. If it is the pump should be running when you first turn the key on.
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Check for feul pressure at the feul rail. If there is pressure, check for proper voltage at the injectors..

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Before you start replacing a fuel pump make sure
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What controls the injector pulse on a 2002 buick rendezvous?


michaelvolla,

All fuel enjected vehicles have a fuel pump relay that controls the pump action when pulling (pumping) fuel to the fuel rail.

If you are experiencing lack of fuel to the engine, chances are that the fuel pump relay needs replaced.

To determine this, answer the following:

1. Is there fuel pressure on the fuel rail after shutting the engine off (at operating temperature) one hour or more after shut off?

If so, then it may not be the relay. It could be the sending unit (fuel pump) itself, but it feul pressure is not present upon pressing the needle in under the black knob on the fuel rail; replace the fuel pump relay first. If this doesn't work, then the fuel pump may need replaced.

Please let me know if you need anymore assistance, or further questions or concerns. Also, inquire abou this with a local parts dealer, as they will also be able to help you in this matter.

The relay and pump are something that you should be able to do yourself, and not have to go to a mechanic or dealer to have replaced. Unless there is extraordinary work invloved, which I highly doubt, but is possible.

Cordially,

carsandcomps,
Guru, Premium Expert @ Fixya.com

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Clogged fuel filter, fuel filter installed with the arrow going the wrong way, or fuel pump bad.

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no probably bad feul pump. test pressure on top of the engine in the feul rail with a pressure tester. you could also have a freind listen for the pump at the rear of the truck. drive sloly till it dies and does the pump sound go away? it is a common problem.

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