

| Subject: | Re: Fuel pressure too high |
| From: | Rick Cooper |
| Date: | Tue, 6 Mar 2018 13:57:54 -0800 |
I'm just looking at track 5 on page 97.104 of the Bentley. The wire that connects to track 33 (Digifant Control Relay) changes its size/guage at P1 -- anyone know what P1 is? Is that the post in the wire distribution box? Rick 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. ;) >> >> 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> >> > > > > -- > *Because **I want my vote to count.* > *And I want my neighbour's vote to count too. * > https://secure.fairvote.ca/en/bc-referendum-vote-pledge > > -- *Because **I want my vote to count.* *And I want my neighbour's vote to count too. * https://secure.fairvote.ca/en/bc-referendum-vote-pledge
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