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D2 - Everything else Anything that doesnt fit elsewhere

 
 
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Old 4th March 2020, 05:05 AM
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27litres 27litres is offline
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Hi Paul,

Sorry I'm late to this discussion!

You can test the pump relatively easily.

Bentley describes a procedure to test it:
It says that fuel volume is measured at the fuel return hose under the bonnet...remove fuel pump fuse (#1 on row #4), ignition off, jump 12v to the lower socket of the empty fuse receptacle. You should get minimum of 350ml of fuel in 15 secs...anything above that, volume is good.

Ok - first of all, the fuel return hose - there are 3 separate hoses at a junction near the right hand (drivers side) shock tower (you'll need to remove the solid plastic inlet pipe to view them).
The hose you want is the tank return hose after the down stream side of the fuel pressure regulator. This hose is not under pressure and is safe to separate. Using this hose means you measure volume that the pump pushes under rail pressure (4 bar ~ 60psi) through the fuel pressure regulator. The area where the three hoses are all together should have a series of joiners for each hose with crimp joiners holding them in place. I cut through one of these crimps, separated the hose and used a 1 foot length of whatever hose I found in the garage (vacuum probably) and fed from the fuel rail side into a margarine container (600ml coke bottle or similar will do too, it won't be in it for long).

Next, you can do as Bentley suggests and hotwire the fuel pump fuse.
Alternatively, you can do what I did and hotwire the pump directly from the battery with a toggle switch, as it's all in the boot - remove boot carpet, open the pump inspection hatch, unplug pump/fuel sender plug. The pump power is the heavier gauge wires.
Power directly to pump, earth via a toggle switch - it's all spade connectors, so easy peasy with a crimp set!

With everything in place (you'll be in the boot, so wedge the margarine pot/coke bottle somewhere), flick the toggle switch and count 1001-1015!
If it works and is able to push 350ml or more past the fuel pressure regulator, the pump is fine.
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Cheers

Marty


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Last edited by 27litres; 4th March 2020 at 05:08 AM.
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