Date: Mon, 11 Jul 2011 23:49:29 -0500
Reply-To: nirav patel <agencia72@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: nirav patel <agencia72@GMAIL.COM>
Subject: Fwd: 84 Westy Fuel Pump Problem
In-Reply-To: <CAPj72qJPcE+YmYduqq3qBrK8gyNKxfj=NBt8sEGPigyWpuWs0A@mail.gmail.com>
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Hello everyone,
Nirav Patel from Austin, TX - USA here. I had to get a new email address
for the vanagon email list, but wanted to follow up with the group on my
earlier email (see below) regarding my fuel pump problems on my '84 westy.
Yesterday I was able to get my fuel pump to do the 1 sec prime when you turn
the key to the 'on' position. However, it was strange scenario.
1) With my digital multimeter between a ground and pin 20 at the relay, I'm
getting a constant 12 volts on the multimeter and the fuel pump runs for 1
second. To hear that sound was a happy moment. I reminded me of my '87.
2) With a solid wire between a ground and pin 20 at the relay, I'm getting a
continuous run of the fuel pump.
Here is a picture of the relay and pin/line 20, which I was touching with
the multimeter:
http://www.agencia72.com/fuel_relays.jpg
Here is a picture of the connector that goes to my ECU. Am I right that the
pin marked in this image is number 20?
http://www.agencia72.com/ecu_connector.jpg
Can anyone explain some theories as to why I'm getting that 1 sec prime in
#1 and confirm that I'm reading the right number in the ECU connector?
Thank you so much. It felt good to make some sort of progress, albiet
unexplained to me.
Safe travels,
+nirav
---------- Forwarded message ----------
From: Nirav V. Patel [USA] <goodbhai@gmail.com>
Date: Mon, Jul 11, 2011 at 10:55 PM
Subject: Fwd: 84 Westy Fuel Pump Problem
To: Nirav Patel <agencia72@gmail.com>
Forwarded conversation
Subject: 84 Westy Fuel Pump Problem
------------------------
From: *Nirav V. Patel [USA]* <goodbhai@gmail.com>
Date: Sat, Jun 11, 2011 at 8:02 PM
To: vanagon@gerry.vanagon.com
I'm a newbie with VW repair and maintenance, but getting better.
Would love any and all thoughts on a problem I have with my fuel pump.
I can't seem to get my fuel pump to do the one sec prime when the key
is in the run position. Fuel pump runs when jumped with 12v. I
tested my wires (Relay to Fuel Pump) with a multimeter, and the output
from the relay box to the fuel pump is reading .10 on the multimeter
for the 1sec duration when the key is on the run position. When the
engine starts I'm getting 12v. I've swapped out my relays and tested
another ECU. The wiring seems intact.
Today I removed the steering column cover to check the key lock
mechanism (ignition switch?). I was told that this mechanism is
signaling to the ECU. When I pulled out the connector behind the key
lock, this is what I saw: http://goo.gl/bgLcy
Is it possible to jump these wires in order to test to see if the key
lock mechanism is broken? If it is broken, perhaps it's not signaling
correctly to the ECU. But then again, maybe I'm completely off base
here. Please help. I'm at a loss.
Greetings from Austin, Texas.
+nirav
----------
From: *Robert Keezer* <warmerwagen@yahoo.com>
Date: Sat, Jun 11, 2011 at 11:51 PM
To: vanagon@gerry.vanagon.com, "Nirav V. Patel [USA]" <goodbhai@gmail.com>
Hi Nirav,
The ECU controls the fuel pump negative ground side.The ignition switch
sends 12 volts to the ECU when switched on.
You can bypass the switch with jumpers. If the ecu is bad, the pump will not
activate. You can first jump the pump relay postion, if the pump stays on
full-time, then jump the ignition switch.If the pump goes on, the switch is
bad. if nothing happens, then it's more likely that the ECU is bad.
Robert
1982 Westfalia
--- On *Sat, 6/11/11, Nirav V. Patel [USA] <goodbhai@GMAIL.COM>* wrote:
From: Nirav V. Patel [USA] <goodbhai@GMAIL.COM>
Subject: 84 Westy Fuel Pump Problem
To: vanagon@GERRY.VANAGON.COM
Date: Saturday, June 11, 2011, 6:02 PM
----------
From: *Dennis Haynes* <d23haynes57@hotmail.com>
Date: Sun, Jun 12, 2011 at 12:07 AM
To: "Nirav V. Patel [USA]" <goodbhai@gmail.com>, vanagon@gerry.vanagon.com
The fuel pump running for a short time after the ignition is turned is not a
design feature. It is a glitch. In order for the pump to run the ECU needs
to see the pulses from the distributor turning. Depending on distributor
position turning the key on will often give a pulse (accompanied by a
spark), and this will cause the pump to run briefly. If the pump runs while
the engine is turning then all is good. No reason to go further.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Nirav V. Patel [USA]
Sent: Saturday, June 11, 2011 9:03 PM
----------
From: *neil n* <musomuso@gmail.com>
Date: Mon, Jun 13, 2011 at 11:08 AM
To: "Nirav V. Patel [USA]" <goodbhai@gmail.com>
Cc: vanagon@gerry.vanagon.com
A new or good used ignition switch can be temporarily installed for
testing or emergency (failed switch) purposes.
This is a useful spare part to carry and doesn't cost much money.
Sounds like your Vanagon runs ok so personally I wouldn't worry about
the priming. That said, now I'm curious.
Assuming all parts concerned are ok and engine not started each time:
if one turns the ign. switch to Ign. on position several times, will
pump eventually not prime?
(fuel pressure is raised to spec ign. switch turned to Ign. on
position 1st time, residual pressure remains at spec)
I don't know how this would be possible though. AFAIK, there's no
electrical connection between the fuel pressure regulator and the ECU,
but just had to ask. < grin > .
Neil.
--
Neil Nicholson '81 VanaJetta 2.0 "Jaco"
http://tubaneil.googlepages.com/
http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
