Date: Tue, 6 Mar 2018 12:48:21 -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: <DM3PR20MB07152D4D119138F91D0BB989A0D90@DM3PR20MB0715.namprd20.prod.outlook.com>
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My problems have worsened for the moment. While the battery was recharging
yesterday, I cleaned the battery terminals and connectors as well as those
at the starter. I did so because the spare battery I tried to jump start
from would just hardly turn the starter over and not enough for the engine
to fire. Felt like a bad connection somewhere. 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? Could I have fried the ECU by leaving the ignition on
overnight to the point of draining the battery? (I don't think that would
cause this, but I may not be understanding these wiring diagrams fully. I
have a spare ECU but I'm reluctant to put it in until I'm sure I'm not
going to damage it.)
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
On Tue, Mar 6, 2018 at 5:53 AM, Dennis Haynes <d23haynes57@hotmail.com>
wrote:
> It is very unlikely that you have a clog in the return line. Only filtered
> fuel goes in that direction. The pump whining is usually caused by a
> restricted inlet or the fuel being heated to the point of vaporizing
> causing the pump to cavitation, which is what makes it noisy. Since you
> have a replacement tank it is possible you have one of the “problem” tanks
> that are out there. I have suffered with bad tanks in 3 different vans.
> Either the screens get clogged with construction debris, including
> corrugated or the outlet tube gets crimped at the bend to the filter. I
> have used a heavy wire pushed through the outlet to break out the tank
> screen with some success. My bet is a bad new tank is your problem.
>
>
>
> Dennis
>
>
>
>
>
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