Date: Tue, 6 Mar 2018 13:53:34 -0800
Reply-To: Rick Cooper <rickdcooper@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Rick Cooper <rickdcooper@GMAIL.COM>
Subject: Re: Fuel pressure too high
In-Reply-To: <CAB2Rwfhf_JphErY05SD_ZmxTOAonA1A1q09DQi4DOUOZ_SiCbw@mail.gmail.com>
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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. ;)
>
> On my air cooled van that larger hose from bottom of charcoal canister
> vents to atmosphere. Came from factory like that. It may be that for some
> markets, this is how that canister is connected. So, say, in US (some? All?
> states) that hose may have to connect to air cleaner. Up here in BC Canada,
> maybe not? e.g. I'm pretty sure that same hose does not connect to my air
> cleaner on my '88 Vanagon.
>
> Neil.
>
>
>
> On Tue, Mar 6, 2018 at 12:48 PM, Rick Cooper <rickdcooper@gmail.com>
> wrote:
>
> ..... In any case, when I put
>> the recharged battery in this morning, I had no power at the fuel pump
>> (but
>> lots of power to turn the starter).
>>
>> There's no power at the fuel pump, because there is none at the "Digifant
>> Control Unit Relay" (as it is called on page 97.106 (track 34) of the
>> Bentley wiring diagram. I've got power at the Alt B+ terminal. If I'm
>> reading the wiring diagrams correctly, that gets power from the Alt B+
>> terminal (on track 5). So have I broken a wire or is there some other
>> possibility? .........
>>
>> I also discovered this morning that the hose from the bottom of the
>> charcoal canister was cut and the end stuffed into the adjacent frame
>> member. The port at the top of the air cleaner has been capped. I was
>> able to blow air through that hose though with some resistance. Not sure
>> whether this is related to my fuel supply problems.
>>
>> Rick
>>
>>
>>
>
> --
> 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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