5KTQCS: Clicking fuel pump relay

[Ti Kan]

Grant Bessom writes:
> [ 86 5Ktq ]
> Is the fuel pump relay suppose to click really fast?

No.

> Turned on the ign and the fuel pump relay was clicking really fast (I could
> here it inside the car).  I then removed the relay cover.  If I inserted a
> fuse the relay would make contact and the cold start valve would start
> spraying for its 10 secs.  What could cause the relay to click really fast
> (15 times per sec) and be audible inside the car?

You probably have a faulty relay.

The fuse holder on the fuel pump relay is not there to engage the
cold start valve or to start the fuel pump.  When you insert a fuse
in there it tells the ECU to initiate a fault code dump sequence (by
blinking the check engine lights).

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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