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Thread: What is it with the Fuel filter on the Y30DT?

  1. #1
    Regular Member BigWilko's Avatar
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    Vehicle : Signum

    Trim : Design

    Engine : 3.0 CDTI

    Year : 2005

    Default What is it with the Fuel filter on the Y30DT?

    Does anyone else have as much of a problem with the fuel filter as i do with mine. I've owned the car 18 months and the next (and imminent) fuel filter change will be its 5th. Do i have a problem? Is it the fact that i i'm using STP injector cleaner that's dislodging deposits in the tank and pipes, Am i using the wrong grade of filter or what. Surely it shouldn't need changing that regularly?

    I can tell when it needs changing as it feels like its misfiring (but its not) on idle, struggles to rev past 3500 revs under load and isn't as pokey. I've tried changing my fuel supplier but it doesn't seem to make a difference.

    Just as a point to note, there's no codes stored and no limp mode.

  2. #2
    Regular Member Penfold101's Avatar
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    When you take the cap off the filter, see how much fuel is in there mate. I spent months having this same issue with mine and in the end I believe it was caused by the filter housing not being completely vertical when it was filled.

    As is well know, the whole system works on a suction principle in that there's no pump in the tank pushing fel through. For some reason it operates purely on the engine pump sucking it through. Whether it was a tiny air leak in the housing seal or somewhere else in the line, mine was slowly sucking air into it over time, and whenever I changed the filter (as you've done too) it went away for a while. When it got to a certain level, it couldn't pull through enough fuel and has a meltdown.

    There are a few ways to solve it. I think what I did in the end was to take the housing off the car, fill it up seperately on the level then put the lid back on. Alternatively, you can put the lid on and fill it to full through the screw hole instead. It should fix it, or at the very least stave it off for a long time. I don't recall the next owner of mine having the same issue...

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    Regular Member BigWilko's Avatar
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    Cheers mate. It's also been suggested to me that it might be the start of SCVs or fuel pump bearing but i just got some prices on some parts & replacements £1700 for a new fuel pump. £225 + fitting for new SCV's. Think i'll try and take a look at the fuel filter first.

  4. #4
    Regular Member Penfold101's Avatar
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    Everyone jumps on the SCV's as the cause for everything fuel related on the V6's - the fact yours if fine every time you change the fuel filter should prove they're ok and it's air in the housing that's the issue. In fact, you could go out and check it now in a few mintes. Take the cap off, see what the level is like and fill it up through the screw-hole. See if it comes back again any time soon...

  5. #5
    Regular Member BigWilko's Avatar
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    Well, after a quick phone call, i've drawn up a plan. Get some live data read (i can do this myself). I just checked the fuel filter housing, and it was half full! Maybe a sign of a failing pump??? Change the filter & Fill up the housing & take some more live readings. See where that leaves me.

  6. #6
    Regular Member Penfold101's Avatar
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    It's not a failing pump mate - otherwise it would be working fine all the time... Don't bother changing the filter - just refill the housing through the screw-hole and see how it runs then If it works fine, then you know the pump and filter are fine and it's just getting air in from somewhere. Having a full-to-the-brim housing may be enough to stop it happening again. Try that before you spend any more money on it - you could fill it up with just the fuel system cleaner if you wanted if you don't have any fuel lying around...

    When you've changed the filter, have you changed both seals too...?

  7. #7
    North West Regional Organiser paulvectrac's Avatar
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    Lol was that phone call to me fpmsl let me no how you get on fella
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

  8. #8
    Regular Member BigWilko's Avatar
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    well, just text you this Paul

    I put the filter housing back together so i could go and get the bits i need, went out & guess what. The car ran perfect! no lumps and bumps and the power was there in every gear right up to the red line. Having a run to manchester this evening so i'll see what its like.

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    I have exactly the same problem with my v6. I had what felt as fuel startion on tuesday this week. I took the top of the filter off and it was 2/3 full. I topped it up with fuel with the lid off and got it going again. Today I replaced the filter and fitted new seals. I topped it up with the lid off and could not get it to run for more than 20 seconds. I took the top off and it was empty. So I filled it again and this time it would not start. Thinking I need to fill it through the centre bolt hole as you lot say. but the air must be coming from the fuel line somewhere. A new pipe is about £55 form dealer.

  10. #10
    Regular Member wotsthestory's Avatar
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    Thought I'd post this picture, I've a thread going here Very poorly - Suspect SCV/Pump I replaced the fuel filter yesterday!

    photo-1.JPG

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