Learning all sorts of new things...

Fuel pump runs for a moment (like usual) once coil is put back into the
equation...

Did the diagnostic on the coil..reads above tolerance (like 9000) for
primary resistance, where Bentley's says it should be no higher than
7600...Would it being this much out of spec not allow the motor to run?

Dave

-----Original Message-----
From: mark drillock [mailto:drillock@earthlink.net]
Sent: Monday, November 15, 2004 12:01 PM
To: David J. Bohannan
Cc: vanagon@GERRY.VANAGON.COM
Subject: Re: More New Info RE: Can't Search Archives: 1.9 stalled at
speed, won't restart...

The fuel pump is NOT supposed to have power just because the key is on.
The ECU tells the fuel pump when to run. For safety reasons the ECU
keeps the pump OFF unless the engine is turning. The exception to this
is that the ECU tells the pump to run for a second or two when the key
is first turned on, just to bring the system up to pressure for
starting. The ECU controls the fuel pump relay and the relay controls
the pump. If you pull out the pump relay and jumper the socket between
pins 30 and 87 the pump should run constantly, regardless of the key
position. ( I would put a 15-20 amp fuse in the jumper for safety)

There is no stock fuse for the fuel pump circuit, or for the ECU power,
or for the injector power, or the coil power. VW decided no fuse was
needed. ?????

Mark

David J. Bohannan wrote:

>Ok, next steps...
>
>Starter removed, but power wires put together to continue power to
>engine...
>With key on, no power to fuel pump...
>
>Have both relays out and they seem to have same ohm reading for same
>poles (relays on LH side of cab, on top of coil)
>
>What could the causes be of having no power to the fuel pump? All fuses
>under the LH side of the dash look fine...I am assuming having the
>starter out of the vehicle should make no difference as long as those 2
>powered wires coming off the back of it are bolted together...
>
>Dave
>1.9 85
>
>