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Home > Technical > Diesel pump |
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Rommel Member Since: 20 Aug 2017 Location: Sandhurst Berkshire Posts: 632 |
Is this after changing the fuel filter?? 2013 FL2 XS.
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16th Dec 2023 1:07 pm |
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Harry34 Member Since: 16 Dec 2023 Location: St Helens Posts: 6 |
No I changed the high pressure pipe on the power steering it started after to remove the air in the system I turned the engine off put the wheel back on and dropped it off the jack then it wouldn't start AA came out 2 hours later he said you have a fueling problem and he went can't get a garage till after Christmas to me it seems like the high pressure pump I presume there's a none return valve in it that's failed don't want to buy a new pump if its not that |
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16th Dec 2023 2:06 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 5006 |
I've read that 3 times and, without punctuation, it's still hard to know what's going on.
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16th Dec 2023 2:40 pm |
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Harry34 Member Since: 16 Dec 2023 Location: St Helens Posts: 6 |
Apologies punctuation isn't my strong point but basically the high pressure fuel pump is letting air in the system or seems to be when ì prime the system you can see fuel go into the pump but as soon as I stop priming the pipe fills with air |
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16th Dec 2023 2:54 pm |
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I Like Chips Member Since: 25 Jun 2017 Location: Ascott Under Wychwood Posts: 1540 |
How much fuel do you have in the tank |
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16th Dec 2023 5:31 pm |
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Harry34 Member Since: 16 Dec 2023 Location: St Helens Posts: 6 |
Well over half a tank |
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16th Dec 2023 6:16 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 5006 |
JLR recommend priming by inserting a hand balloon pump between fuel filter and the fuel tank, so cleaned fuel is pushed up to the HP pump, which normally sucks fuel up from the tank, through the fuel filter.. Because the HP pump creates a negative pressure in the fuel line, any leak will result in air being sucked into the line, rather than fuel leaking out, causing the engine to not start or stop quickly. By pressuring the system with a hand pump you may be able to see fuel leaking. The hand balloon pump gets quite hard when the air has been flushed through back to the fuel tank (as the compressible air is removed)- you can hear bubbling in the tank stopping when the air has been flushed through. Ofcourse if your hand pump is entraining air you'll never resolve the problem. How do you explain this fuel problem occurring after you worked on the steering system ? Jules |
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16th Dec 2023 6:24 pm |
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Harry34 Member Since: 16 Dec 2023 Location: St Helens Posts: 6 |
I pumped fuel through the high pressure pump can't say the hand pump got any harder to pump and when I stopped pumping air returns to the fuel pipe |
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16th Dec 2023 6:39 pm |
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Rommel Member Since: 20 Aug 2017 Location: Sandhurst Berkshire Posts: 632 |
I don't think you can pump fuel "through " the HP pump only to it? are you able to fully prime the fuel filter? with a hand pump? if so try starting the engine without removing the hand pump, if air is entering the pipe
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16th Dec 2023 7:06 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 5006 |
Can you clarify where you have sited the hand pump. From manual The hand pump goes in at (7). Jules |
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16th Dec 2023 9:48 pm |
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Harry34 Member Since: 16 Dec 2023 Location: St Helens Posts: 6 |
As the picture
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16th Dec 2023 10:22 pm |
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Luke G Member Since: 26 Jan 2019 Location: Australia Posts: 87 |
I’ve had similar problems and got around it by attaching a brake bleed kit hooked up to an air compressor and sucking the fuel through the system at point 8 in the diagram (return fuel line attachment on the fuel filter). This ensured there was no air in the system. |
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25th Dec 2023 7:14 pm |
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