Fuel Pump Flow And Return Outlets - Which Is Which?

[jez205 1]

Having taken the tank out of my car over a year ago now and lost the marks I made on the fuel pump I'm trying to work out which is the high pressure outlet and which the return pipe connects to.

 

I can blow down one but not the other so I'm guessing the one I can blow down is the return but can anyone say for definite?

 

Car is a 1990 1.9 gti and the pump is the black one.

 

Thanks

 

Jeremy

[j_turnell 137 3 Cars]

Look to see which outlet goes directly into the top of the pump. You should be able to see a rubber reducer pipe which goes from the pump to bottom of the outlet.

[dcc 855]

iirc you can blow through the return

[jez205 1]

The pump doesn't want to budge so I've just replaced the corroded retaining ring with one of Tom's stainless ones and left it in place, I don't want to risk destroying a working pump by levering it up.

 

Being able to blow through the return makes sense to me so I'll try to connect that way first.

 

Thanks

[welshpug 1,666]

connect the pipes and bung the pipe off the filter into a pot, turn the ignition on, simples

[pug_ham 245 3 Cars]

Looking at the service box diagram then the supply is the rear most outlet on the pump with the return in front.

 

 

g.