vito High Pressure Fuel Pump CDI - Mercedes-Benz Forum

 
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post #1 of 4 (permalink) Old 12-03-2011, 10:32 AM Thread Starter
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vito High Pressure Fuel Pump CDI

hi i have just bought a vito 2.2 110 cdi on an 02
i got it as a none runner the guy said it was getting harder to start the would not start then the starter just started to click. he said its had new filtter and heater plugs
i got it home and replaced the starter then hit the fourms 1st thing that came up was the injectors. so i got the tools out and started the investergate
the van will run on easy start but die when it runs out which tells me its not getting fuel
ive traced the fuel back from the injectors when i crack an injector pipe nothing comes out i got down to the High Pressure Fuel Pump and nothing is coming out of that, this tells me the pump is not working. the thing that is confussing me is on other fourms people are say it will bump and run when the pump is not working (it will just not start) this dose not happen for me.also so i had to buy a hand primer and pump the fuel from the line that goes to the tank up to the filtter. im now ready to go and buy a pump looking at about £120
would like some advice before i do
thanks

Last edited by numnut; 12-03-2011 at 10:40 AM.
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post #2 of 4 (permalink) Old 12-03-2011, 12:24 PM
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Welcome to the forum. I have no direct experience with your engine, but could not help to notice that you are willing to spend £120 on hints, without solid troubleshooting.
Your car might have a mode that will display fuel pressure, or at least pop a low fuel pressure code, so I would start research there.
Than there is much more to no fuel pressure in the rail, than bad pump. Could be leaky valve, or internal injector leak.
Disconnect injector leak hoses and see how much fuel they dump.
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post #3 of 4 (permalink) Old 12-03-2011, 12:50 PM Thread Starter
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vito

thanks for your reply i have scannned with a bacis OBD2 scanner its not showing any codes unless my scanner is not picking them up

i will try the a leak off test but i dont see the point if theres nothing coming out of the pump itsself i the same have never worked on this engine before

thanks again for your reply
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post #4 of 4 (permalink) Old 12-03-2011, 01:50 PM
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You need a help from somebody knowing that particular engine. I would make sure the pump is getting fuel in the first place, so checking all the components on the route would be in order.
Bad part is that not only there is not too many diesel owners on this forum, but your engine is pretty rare. Hopefully someone with better knowledge will come. Good luck
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