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Fault code P0251 Injection pump fuel metering control A


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#1 stubbs_m

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Posted 25 February 2011 - 02:53 PM

Mine has the typical limp mode and sometimes cutting out, I took it to a place in Swindon and basically when I was booking it in he told me what it was. The garage (diesel injectors specialist) said it's a very common proble on the 130 model. I had two codes P0251 and P1121 if i recall correctly, one being low pressure output from the pump and secondly low pressure sensing from the injector. His recommendation was, new injectors, new filter and tank flush £1,500.

He then went into detail about the fuel pumps having poor bearings in them and when they break down the debris can migrate up to the injectors, I'm going to try changing the pump and flushing the tank, but does anyone know if the ECU settings will need to be modified with a new pump of is it just plug and play ?

Mat

#2 SRH990

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Posted 25 February 2011 - 04:14 PM

The ECU controls the fuel injection and fires the injectors and the injector calibration codes are programmed into the ECU, the pump on the TDCi is just a dumb pump which supplies pressure, it doesn't even have to be timed so you can change it with no re-programming required.
Steve H

'06 Zetec TDCi 130 Euro IV, '04 TDCi 130 Euro IV

#3 barrie m

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Posted 25 February 2011 - 08:39 PM

Mine has the typical limp mode and sometimes cutting out, I took it to a place in Swindon and basically when I was booking it in he told me what it was. The garage (diesel injectors specialist) said it's a very common proble on the 130 model. I had two codes P0251 and P1121 if i recall correctly, one being low pressure output from the pump and secondly low pressure sensing from the injector. His recommendation was, new injectors, new filter and tank flush £1,500.

He then went into detail about the fuel pumps having poor bearings in them and when they break down the debris can migrate up to the injectors, I'm going to try changing the pump and flushing the tank, but does anyone know if the ECU settings will need to be modified with a new pump of is it just plug and play ?

Mat


i would get a second opinion, sounds like his tring it on to me, get loads of mondeos with theses dtc's

i would change the fuel filter 1st and try it, if still the same then get a leak off test done of injectors, if they r all ok then change the metering valve on fuel pump

i sure that a refined pump was fitted too cars after 2002 year

#4 SRH990

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Posted 26 February 2011 - 11:09 AM

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He then went into detail about the fuel pumps having poor bearings in them and when they break down the debris can migrate up to the injectors,


There were problems with the injection pumps on early models which could cause metal debris to get into the injector pipework & injectors, there's a procedure which involves collecting diesel & checking for metal particles - this is probably what he is referring to.

Ford recommend that the pipes from the common rail to the injectors are replaced when the injectors are changed to avoid problems with any foreign matter that gets in during removal causing problems, they even provide clear warnings that a vacuum should be used to clean the area when any part of the fuel system is to be opened.
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Steve H

'06 Zetec TDCi 130 Euro IV, '04 TDCi 130 Euro IV

#5 stubbs_m

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Posted 27 February 2011 - 04:06 PM

Thanks for the info guys it really helps, is the metering valve different to the pump or built in to it ?

I was gonna start at the pump and move to the leak off next.

Yeah I think the advise I was given was a little bias, wanna keep my car now i've done a couple of liitle mods

#6 saquib

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Posted 27 February 2011 - 11:07 PM

hi i have a ford focus 06 110 diesel zetec had turbo replaced bacause it had gone it was fine for to days then had problems starting it . it started with easy start and jump startin but now it dosnt start . but when it dose start its perfect i bought this car for work but its draining me out now spent over 1000 pounds . its showing the code p0251 and mechanics in bradford dont know where to start from i would like to know the exact problem and see if its worth getting repaired and if not ill get rid of it plz tell me what it might be and how much it might cost me . ps it feels as if its not getting enough diesel to start because it starts with easy start .thanks any advice would be much appreciated

#7 barrie m

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Posted 28 February 2011 - 09:59 PM

what engine? 1.6, 1.8 or 2.0?

have they checked all connections, as 1 for metering valve may b loose?

when was the fuel filter last changed? but always worth replacing regardless

may b themetering valve sticking stopping the rail pressure getting up to pressure

#8 saquib

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Posted 28 February 2011 - 10:10 PM

what engine? 1.6, 1.8 or 2.0?

have they checked all connections, as 1 for metering valve may b loose?

when was the fuel filter last changed? but always worth replacing regardless

may b themetering valve sticking stopping the rail pressure getting up to pressure



its 1.6 diesel have these cars got alot of common faults thanks.

#9 stubbs_m

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Posted 29 March 2011 - 08:17 PM


He then went into detail about the fuel pumps having poor bearings in them and when they break down the debris can migrate up to the injectors,


There were problems with the injection pumps on early models which could cause metal debris to get into the injector pipework & injectors, there's a procedure which involves collecting diesel & checking for metal particles - this is probably what he is referring to.

Ford recommend that the pipes from the common rail to the injectors are replaced when the injectors are changed to avoid problems with any foreign matter that gets in during removal causing problems, they even provide clear warnings that a vacuum should be used to clean the area when any part of the fuel system is to be opened.



Well I've got some great news, all the pump thing was complete crap, some sound advice from a friend of a friend that work for an injector test company.

One of my injectors was failing and returning too much fuel to tank rather than hold the pressure in the common rail.

A simple test, disconnect the electrical plug on the injectors and the downstream pipe of the leak off, crank the engine over and if you see a noticable difference if the flow in the leak off then that the likely problem injector.

I took mine in a great place in High wycombe and they changed the injector and reprogramed it for 250 quid, the ecu still needs to learn the injector foot print to make sure you do 100 miles plus before worrying about it.

I've now done over 500 miles, with cruise control, ragging the arse off it, and round town driving,

All good !

My buddy also said the pump problem would indicate by rough idle which i never had, or tap off a sample from the leak off return pipe and boil off the diesel and see if you have a brassy deposit left after.


Mat




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