fuel not getting to rail

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phil1955

New Member
Joined
Aug 9, 2015
Messages
5
Car
c class 220 cdi
I have just fitted a recon cp 1 pump and pipes but no fuel is getting to the common rail on my c class. can anyone help
 
Did you prime the pump?
(Does anyone know if it needs to be primed or are they self priming? - It could just be an airlock?

Is there a filter which could be blocked?

Is there definitely power at the pump, check the wires with a voltmeter.
 
I assume this is W202/W203? No priming needed, but you may fill the filter bowl, and/or open fuel line from aux pump (no electrical pump!) to hp-pump and see if fuel is delivered from aux pump when engine is cranked (quickly reconnect line if it does).
What is model year of your car? If you have shut down valve (it was removed from design around end of the 2001), check connection wires of valve.
If its W203 do you have at least 1/2 tank fuel? Old hp-pump may have caused saddle tank filled unevenly and now pump suction side is empty if gauge shows less than half tank.
 
Deffinatley Diesel in the tank? (It does happen) so long as everything is sealed correctly you will need to draw the fuel up from the tank as the system will be full of air.
 

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