Date: Tue, 6 Mar 2018 14:01:37 -0800
Reply-To: Neil N <musomuso@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Neil N <musomuso@GMAIL.COM>
Subject: Re: Fuel pressure too high
In-Reply-To: <CAG12aiteU1b6qOFKSRJZ9BDB0CJTfVvgSRVMyWc-rGKxTwoNdg@mail.gmail.com>
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Its possible a previous owner fused the wire between alternator B+ stud and
the B+ post in the black distribution box. But.... that wire was NOT fused
at factory. You probably already "said" or observed this but yes; you
should see B+ at post (P1) in the junction box, ignition on or off. From P1
in distribution box, B+ goes to a 2 pin connector at the relay box.
On Tue, Mar 6, 2018 at 1:53 PM, Rick Cooper <rickdcooper@gmail.com> wrote:
> Thanks for the prompt responses; this is frustrating.
>
> So since I do not have power at 30 terminal on the Digifant relay, I must
> have a break in the line between that and the Alt B+ terminal. In tracing
> the wire from the alternator, I thought it entered the wire distribution
> box and connect to the post in the upper LH corner. Is that correct? If
> so, I have no continuity in that line so I'm thinking it needs
> replacement. Does that make sense? If this is not the faulty wire, any
> advice on how to find it?
>
> Thanks again, Rick
>
>
>
> On Tue, Mar 6, 2018 at 1:31 PM, Neil N <musomuso@gmail.com> wrote:
>
> The fuel pump should go on/off briefly once key is turned to ignition on;
>> it doesn't run after that until engine has started. Try the fuel pump
>> bypass method shown in Bentley? See if pump runs? Theres more to it than
>> this but basically, B+ from alternator stud goes to 30 of fuel and Digifant
>> relay; ignition off or on, you should see battery voltage at each relay 30.
>> With key turned to ignition on, Digifant relay closes so battery voltage
>> should be seen at 87 of that relay. And, you should see same at fuel pump
>> relay 86. Along with my comment above, the ECU controls the fuel pump relay
>> so you'd see battery voltage at fuel pump relay 87 once engine is running
>> but thats kind of a moot thing to say. ;)
>>
>>>
>>
>>
--
Neil n
Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca>
1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy>
1981 Westfalia "Jaco" Images, technical <http://tubaneil.googlepages.com/>
Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>
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