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RE: [T3] FI fuel pump relay and 70 FI Auto update


On 5 Sep 2006 at 19:31, Big Al wrote:

> I poured liquid into the tank and watched as the center bowl filed quite
> quickly and the supply tube and return tube are visibly clear, So I
> really don't think it will be as big of a problem as you have
> suspected.

As long as gas gets into the center bowl easily, you should be fine.

> actually I was wondering if I needed to fill the pump with gas similar
> to bench bleeding a master brake cylinder, but we'll see if the
> knocking with a hammer will get it to spin.

Bench bleeding is another of those myths that needs to be dispelled. 
It's just a way to make a simple job really awful. There may be cars 
out there that actually require it, but VW never made any of them. 

As for priming the pump, there's nothing you need to do other than 
make sure that gas is free to flow out of the tank.

> And I should probably disconnect wire 19 from the control module to
> protect it, right?

No, leave it alone. You're not jumpering any of the wires that lead 
to the control module; those wires are on the control (coil) side of 
the relay. The red wires you're jumpering are on the output (contact) 
side of the relay. This is just a simple way to bypass the whole 
brain/relay/relay/wiring harness jumble to eliminate all the 
complexities that are necessary for running but get in the way for 
testing.

-- 
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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