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Old 07-15-2019, 02:27 AM   #1
rodney@rdhmarinesubic.com
 
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Default Fuel Syphoning 1998 308D LWB

I have a 1998 308D LWB.If i park it overnite when i start it in the morning she runs fine and than stops.
I discovered the Fuel filter has no fuel.So obviously draining back into the tank.
Any thoughts
Thanks Rod
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Old 07-15-2019, 03:32 AM   #2
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Default Re: Fuel Syphoning

It certainly sounds like air is leaking in "above" the filter (such as through the high pressure pump or the low pressure pump)

If it was further upstream (exit of HP pump, fuel rail) i'd expect you to see spray marks or puddles.
It could even be coming from the tank ... if the pressure relief solenoid was stuck open.

A leaky injector could also be introducing air (and you wouldn't see puddles or spray), but that would require that the route through the HP pump (so the metering solenoid in front of it) also be "passing gas"... (i.e. air)

Meanwhile: find a steep slope so you can park "nose down".

--dick
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((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))
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Old 07-15-2019, 03:55 AM   #3
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Default Re: Fuel Syphoning

I didnt realise it had a high pressure and low pressure pump?
I would like to buy a Workshop Manual any recommendations?
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Old 07-15-2019, 08:24 AM   #4
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Default Re: Fuel Syphoning

Rodney,

There is a scanned copy of a Peter Russek manual for your model on the DIY Sprinter resource site... http://diysprinter.co.uk/reference/M..._manual_EN.pdf

Keith.
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Old 07-16-2019, 02:07 AM   #5
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Default Re: Fuel Syphoning

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Rodney,

There is a scanned copy of a Peter Russek manual for your model on the DIY Sprinter resource site... http://diysprinter.co.uk/reference/M..._manual_EN.pdf

Keith.
Downloaded Manual Thanks
But i need a more detailed layout of the Fuel Filter and lines to the Pump and back to the tank as i feel i have an air leak somewhere?
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Old 07-16-2019, 02:09 AM   #6
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Default Re: Fuel Syphoning

Downloaded the Manula.Thanks
How ever i need a more detailed explanation of the Fuel system to the pump and back to the tank?
Thanks rod
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Old 07-16-2019, 06:57 AM   #7
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Default Re: Fuel Syphoning

Quote:
Originally Posted by autostaretx View Post
It certainly sounds like air is leaking in "above" the filter (such as through the high pressure pump or the low pressure pump)
If it was further upstream (exit of HP pump, fuel rail) i'd expect you to see spray marks or puddles.
It could even be coming from the tank ... if the pressure relief solenoid was stuck open.
A leaky injector could also be introducing air (and you wouldn't see puddles or spray), but that would require that the route through the HP pump (so the metering solenoid in front of it) also be "passing gas"... (i.e. air)
Meanwhile: find a steep slope so you can park "nose down".
--dick
Hi
I do believe this answer is describing a later model. There is no low pressure and high pressure pump in this vehicle. It is the old style injection pump with seperate HP lines to each injector.
Still sounds like an air leak in the filter or the lines around it. I would take the filter off and check the orings and seating. perhaps put a new filter kit in as it will have the o rings. If it is like the 5 cyl engine you can take off the filter bracket to make it easier to remove/refit the filter.
The USA people would not have seen this engine I believe ! I am not even sure if the diagrams in that manual are for your model !! They look earlier to me.
Jaahn
PS to the moderator, why not shift the discussion to the Aussie etc section !

Last edited by jaahn; 07-16-2019 at 07:09 AM.
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Old 07-17-2019, 07:06 AM   #8
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Default Re: Fuel Syphoning 1998 308D LWB

Thanks Jaahn.
I have checked my records and my problems started after having the van serviced including a new filter...I will check the filterassembly and put in a new filtewr
Thanks Rod
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Old 07-17-2019, 11:16 AM   #9
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Default Re: Fuel Syphoning 1998 308D LWB

PUT GENUINE FILTER ON. I have same prob everytime I have put on an aftermarket one. I think maybe the merc Orings are slightly fatter , therefore seal better
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Old 07-17-2019, 11:50 PM   #10
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Default Re: Fuel Syphoning 1998 308D LWB

Hi Rod
You should find the problem there. I use Mann/Mahle filters which work OK. Not sure what filter is on your vehicle but mine is a simple arrangement with a center screw. I see two small orings also supplied so I guess they go on the center bolt. Been a while since I did it. Simple to change if you remove the mounting bracket to remove the filter. Loosen the center bolt first. Check if a previous O ring was left stuck on or that a new one dropped out of position and the center bolt has a good one . The bracket bolts are tork heads !!

Thanks to the moderator for moving your thread here so we all can see it. Now you know where "home" is and can bookmark it. A good moderator like we have on here makes a forum run well
jaahn

Last edited by jaahn; 07-18-2019 at 12:16 AM.
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