Fiesta mk7 1.6 tdci (HDi) 2009 - wireless fuel pump

[Haz94ch]

Hi, I have a Ford Fiesta 1.6 tdci and it was working and everything fine. I left it for one day and next day it won’t start.
When the recovery guy came he checked it and run some tests on the obd2 he said 0 Psa fuel pressure.

We checked the fuses he said all of them good. Relay is clicking as well. We lifted the car a bit he went underneath it to hear the fuel pump but nothing. He said most probably it will be the fuel pump. Now the thing is I took it to a garage and they took the tank off . For my surprise there was only a fuel sender in the tank and not a pump/sender or pump. I mean there is no way a gauge with 2 hoses will pump fuel right? (Please see the picture below, that’s the part that has been replaced)

Anyway, we changed it , but nothing, then they said it could be some valve or common rail something? My point is I really hope is not the high pressure pump underneath the engine , because otherwise I think I will be commuting on my push bike and that’s it. The pump alone is about £500 and to install and this and that.... uff boy .

Anyone wants to tell me that it might not be the fuel pump and raise my hopes? ????

Take a look at this, is this diagram correct?

Fuel in tank>fuel sender>(god knows how the fuel gets to the bloody fuel filter> bloody fuel filter>high pressure pump> common rail> injectors > etc

Thank you all.

[Haz94ch]

See basically 2 months ago same thing happened, but at that time fuel pressure was low. I sprayed easy start in it and it started and it worked fine and since then it started from the very first time every single day in the last 2 months until before yesterday. Do you recommend I replace the fuel filter being the chepest option part in the fuelling system? Many thanks for your reply very helpfull. Thanks

[Haz94ch]

Rat_Fink_67 said:

The fuel gets drawn to the filter purely down to vacuum caused by the mechanical pump. I'm a Ford diagnostic tech and have yet to see a pump on one of these engines fail. 90% of the time a non start on the DV6 engine is caused by a blocked or incorrectly fitted fuel filter. Next suspect is a leaking injector usually.

Could it be that the filter was very clogged that’s why it had 0 fuel pressure?? Everyone has told me that the car is pretty new to have that gone in it? -(ok maybe not so new but that’s what another mechanic said). Thanks

[Haz94ch]

Rat_Fink_67 said:

Haz94ch said:

Could it be that the filter was very clogged that’s why it had 0 fuel pressure?? Everyone has told me that the car is pretty new to have that gone in it? -(ok maybe not so new but that’s what another mechanic said). Thanks

It is possible yeah, they're very sensitive to fuel filters, and can block in less than 40,000 miles or 3 years use. Given the cost is relatively cheap, yeah it'd be definitely worth a try. I'm surprised the rail pressure is zero, but as I don't know what equipment was used to log it and am not in front of the car it's difficult for me to comment. Do you know when the fuel filter was last replaced? It's on a 3yr/37.5k interval.

I believe he used a pc and connected it to the obd2 port and no fuel pressure - he was the guy from RAC- I have no idea when the fuel filter was last changed i only got the car 2 months ago.

[Haz94ch]

stevensdrs said:

The clue is in that you left it for a day without use. The problem will be a clogged filter or an air leak in the pipe between the filter and the fuel pump which causes a loss of vacuum and hence no fuel or perhaps a leaking injector. My bet is an air leak.

I told this to the mechanic. He said he doesn’t think so?? Anyway let’s see what will he say. Previous mechanic checked it and said something about a valve or common rail issue? He said 80% chance the fuel pump is fine.