Re: [T3] buzzing fuel pump relay con't

["Jim Adney" <jadney@vwtype3.org>]

On 20 Oct 2000, at 10:43, Jeff Palmer wrote:

> I have two problems which I hope are associated.  The fuel pump relay
> under the dash clicks when the engine is turning over (maybe 3
> clicks/second) and clicks much faster when the engine starts.  This is
> the same problem I had a couple of weeks ago. I tried a different
> relay yesterday with the same results.

Look under the back seat and find the identical looking relay there. 
Make sure the mounting screw for that relay is tight; it holds the 
ground wire for that relay, which supplies the entire FI system, 
including the pump relay. Check all the wires around both relays. If 
you have a spare relay now, try a different relay in the main power 
position.

Another connection to check would be the wire to the pump relay 
that is in the engine compartment. It is an in-line connector against 
the front bulkhead just to the left of center; there is usually a tie-
wrap around it. Make sure that it is properly connected.

The pump relay should not click except when you turn the key ON 
(or again ~1 sec later if you don't start the car.

> Also, the car is difficult to start when cold, like its not getting
> fuel.  When warm after running for a bit it starts right up.  

May be related. Find the cause and fix the clicking first. Then see if 
the other problem has gone away.

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054

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