I need to depressurize my fuel system to change my fuel pressure regulator.

I've already taken the turbo off as I was going to change that on it's own, but I found out it's much easier to do the FPR with the turbo off.

Can't start engine now to get rid of pressure in the fuel system.


Is there any way of doing this apart from having a glass jar ready and pull a fuel pipe off the filter or somewhere and catch what you can ?

Note to self - wear safety glasses as petrol in the eye hurts a lot

Thanks

 

Running the engine would just increase the pressure.

I disconnected the output pipe from the fuel filter, i had some rag in my hand when i disconnected it, fuel just soaked into the rag with no spray escaping.

You will also need to put the rag around the FPR when you take it off as the lines will still be full of fuel.

 

Sorry - should have said, run engine with fuel pump disconnected. Thats the usual way.

 

yeah fuel filter is the easist area to disconnect it from.. just realise fuel will come out of both ends not just from the filter etc..

rag over it helps
Simon

 

surely just taking off fuel cap would depressurise system,then when pipes disconnected it will drip out but not squirt out? is this not the case on scoobs?

 

Not true.

Fuel system is pressurized to 3bar, even when fuel pump is not running. Pressure is in the fuel pipes that feed the injectors, not in the tank.

So if you disconnect anything in the fuel system it wees out at you - I know as I didn't depressurize the system when I changed my fuel filter 1st time.

To do it properly you disconnect the fuel pump power (under back seat behind driver) then start the engine and run it till it stalls, then turn it over for 20 - 30 seconds after that.

Note - don't do this with the car sloping towards the back - as engine fires for about 1 sec then stalls, but pressure is not released - took me bloody ages to do it like that and starter got cycled about 200 times. Works much better if car is aiming down hill / my drive.

 

Sorry to be stupid, but where is the fuel filter? (I have walbro pump, SX reg...)

I need to drain the system so I can remove the desirable parts to sell.

 

Fuel pressure usually decays naturally overnight, so no problem..

 

fuel pressure does decay over night as said.. the fuel filter is however on the passenger side strut turret, just back from the washer bottle..

Simon

 

Oh, is it the black cylinder thingie?

 

Yes mate

 

just pull the pipe off the fuel filter job done. its not going to pee out for long and its only a little bit. disconnected mine last saturday.