In line fuel injection pump

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slowcoach
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Re: In line fuel injection pump

Post by slowcoach »

Also try starting the van (when the pump is not playing) with the petrol filler cap removed- see if the tank has a vacuum problem
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Re: In line fuel injection pump

Post by pkrboo »

mshaw1980 wrote:The fuel rail on a subaru engine takes an 8mm bore hose from the fuel pump which is why that size hose is used. I assume the 12mm bore input from the tank is so there is sufficient fuel coming into the pump and then the reduction to 8mm on the fuel pump outlet is to increase fuel pressure to an adequate level.

Surely a fuel filter before and after the fuel pump would cause a further obstruction putting the pump under more pressure.

It is stated that the pump needs to be lower than the tank outlet for gravity feed however that doesnt work if parked front end downhill or driving downhill as the fuel is flowing away from the pump at that point and so the pump will have to work harder. The only way for gravity feed to work in all scenarios would be for the pump to be mounted further down which would mean it would be too near to the road.

most pumps have a check valve so should not leak/drain back so there should be enough fuel for it to start.

unless the tank was really low on fuel I dont think it should make a big difference.

what model Bosch pump have you fitted?
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Re: In line fuel injection pump

Post by Oldiebut goodie »

937carrera wrote:
Oldiebut goodie wrote: If a see-through filter is used after the pump any large quantity of air being pumped would soon be seen.

Can you get see through filters that will take 3 bar ?

10 bar do you?
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Re: In line fuel injection pump

Post by 937carrera »

Seems a decent bit of kit, but intended for use on fuel dispensers (avoiding the word pump) and on large engines, like on ships perhaps.

Interesting to see the flow rate, but based on 600mm of head to the tank

I'm pretty sure that there will be a spec for the fuel pump / FPR delivery rate on the EJ20. 2 litres a minute will be more than adequate
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Re: In line fuel injection pump

Post by slowcoach »

937carrera wrote:Seems a decent bit of kit, but intended for use on fuel dispensers (avoiding the word pump) and on large engines, like on ships perhaps.

Interesting to see the flow rate, but based on 600mm of head to the tank

I'm pretty sure that there will be a spec for the fuel pump / FPR delivery rate on the EJ20. 2 litres a minute will be more than adequate
The flow rate of the stock vw pump (fine for the Subaru) is listed in the bently, with instructions for the flow test :-)
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Re: In line fuel injection pump

Post by 937carrera »

:ok

As I said 2 litres / minute will be more than adequate, the spec being 1 litre / minute, page 222 to make life easy

I'm just waiting to hear that he has an 044 pump fitted :lol:
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Re: In line fuel injection pump

Post by mshaw1980 »

This is the pump I haveImage

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Re: In line fuel injection pump

Post by 937carrera »

That cross references to the standard one for a DJ engine amongst others, common pump too. Nothing wrong there, assuming it's genuine stock, not a Chinese copy
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Re: In line fuel injection pump

Post by tobydog »

mshaw1980 wrote:I never tend to have more than half a tank of fuel and I do sometimes let it get quite low before refilling.
Try keeping the tank fuller with fuel and see if it helps?
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Re: In line fuel injection pump

Post by mshaw1980 »

It seems genuine, box, seal etc. Supplier also swapped it no questions asked. I am going to cut the old fuel filter open like you suggested to check that. Hoping that maybe the problem as I have just been thinking back and I am thinking that the fuel filter was not replaced after I changed from the old carburettor tank to the injection one after the conversion. Thought I had but with the amount of projects, work, kids etc going on would have been an easy one to overlook.
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Re: In line fuel injection pump

Post by mshaw1980 »

tobydog wrote:
mshaw1980 wrote:I never tend to have more than half a tank of fuel and I do sometimes let it get quite low before refilling.
Try keeping the tank fuller with fuel and see if it helps?

Tried doing this today. Nice trek out, stopped for a few hours then pump wouldn't prime. Hoping my fuel filter error maybe the issue.
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Re: In line fuel injection pump

Post by pkrboo »

could use something like his as a pre pump filter

https://www.ebay.co.uk/itm/SYTEC-MOTORS ... Sw2xRYU9WC" onclick="window.open(this.href);return false;

pre and post pump filters shouldnt cause much of a restirction, i thik you risue may be more to do with filter location, stupid question time- You have mounted the pump the correct direction?
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Re: In line fuel injection pump

Post by mshaw1980 »

pkrboo wrote:could use something like his as a pre pump filter

https://www.ebay.co.uk/itm/SYTEC-MOTORS ... Sw2xRYU9WC" onclick="window.open(this.href);return false;

pre and post pump filters shouldnt cause much of a restirction, i thik you risue may be more to do with filter location, stupid question time- You have mounted the pump the correct direction?

Think I may have to try that filter. Pump is correct way around. 12mm inlet, 8mm outlet. Would be difficult to get it wrong.
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Re: In line fuel injection pump

Post by 937carrera »

That guy does a lot of stuff with motorsport Cosworths if I recall correctly
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Re: In line fuel injection pump

Post by pkrboo »

mshaw1980 wrote:
pkrboo wrote:could use something like his as a pre pump filter

https://www.ebay.co.uk/itm/SYTEC-MOTORS ... Sw2xRYU9WC" onclick="window.open(this.href);return false;

pre and post pump filters shouldnt cause much of a restirction, i thik you risue may be more to do with filter location, stupid question time- You have mounted the pump the correct direction?

Think I may have to try that filter. Pump is correct way around. 12mm inlet, 8mm outlet. Would be difficult to get it wrong.
Believe me it's been done before!!(not by me)

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