Re: Think the fuel pump is toast

[thescirocco@juno.com]

On Thu, 23 Nov 2000 13:58:31 -0500 "RoccoPhil" <roccophil@mindspring.com>
writes:
> Hey all,
> 
> Went out this afternoon to check it all out.  Checked the Hall 
> sender wiring (not great, but no breakage, openings, or anything), so I
don't 
> think it's ignition.
> 
> Tried to start her up, but no start. Turns over strong but, like, no 
> fuel delivery (and since it's cold I can't KEEP trying to turn it
over).  
> I heard the relay clicking sporadically.  The Jetta relay is not the
same 
> part number or size (missing a circuit - don't know what it's for yet).
 
> Same poles ( 30 and 87) and whatnot and same amperage.  Tried that but
nothing
> either.
> 
> At this point I suspect the fuel pump.  Question is, how to check 
> for fuel pressure?  IF the pump is gone, then am I right by assuming
that all
> residual pressure in the system is shot also?  Can I slightly 
> relieve pressure at the fuel filter intake (pump side) to see if
pressure is 
> there or not?  Or would that be an invalid test for pressure?  I don't 
> feel like getting an injector out since I don't have the tool here, the

> o-rings are toast, and it's below freezing outside.
> 
> Also, I am interested in making the fuel pump relay jumper wire.  I 
> don't have any wiring here except what is on the Jetta (HAHAHA).  
> Seriously.
> Anything there gonna work?

Yes...

I would sacrifice that Jetta fuel pump relay, and make it into fuel pump
relay test jig.
Look at the bottom of the relay and you'll see how the plastic relay case
snaps onto the base.
Use a small screwdriver and push the tab out as you work the base out.
Then cut the circuit board off and remove the smaller terminals, leaving
only the 2 large terminals.
Then solder the terminals together and pop the case back on, and you have
a foolproof fuel pump relay test jig.

Remove the seat cushion, the fuel gauge sending unit/transfer pump cover
plate, energize the fuel pump, put your hand on the sending unit, 
and as long as you have power to the transfer pump, you'll feel and hear
the transfer pump run. 

You can also hook up a hose to the output on top of the sending
unit/transfer pump and run it into a container and check the fuel
delivery.

HTH, and Happy Thanksgiving,

Peter
'79 Scirocco 16V project car
'83 GTI "Caged Rabbit" 
'84 Scirocco, RD/FF
'80, '88 Scirocco rollers

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