Just a thought....
 
I had a similar problem a while back...ended up I had pushed one of the connectors back inside the plug when I pushed it on the ECU...peeled the rubber boot back (carefully) pushed the connector back into the plastic plug with a click...installed the plug back on the ECU and checked the connector stayed seated before I rolled the boot back on...everything has been great since.
 
DenJ

>________________________________
> From: Ken Wilford <kenwilfy@COMCAST.NET>
>To: vanagon@GERRY.VANAGON.COM 
>Sent: Wednesday, April 25, 2012 2:42:31 PM
>Subject: Re: more information on engine swap/fuel pump woes
>  
>Jess, I have been running into issues with the digijet fuel injection
>harness lately in which the problems are caused by the harness itself
>breaking down over time.  In other words, connections inside the harness
>are going bad with age and cause this different issues.  Sometimes they
>are intermittent problems, sometimes they are caused by moving the
>harness like you did when you replaced the engine.  I think you will
>find that your problem is cause by a fault in the harness itself.  If
>you look at the Bentley Manual on 97.61 and 97.62 at the wiring diagram,
>you can see where a bunch of grounds come together right below the fuel
>injectors.  This is also the ground for the fuel pump relay.  This
>ground cluster is actually inside the wiring harness in a big crimp
>connection.  You have to cut the outer sheathing on the harness to see
>this.  I think the fault is there.  You could try to repair it yourself
>but if it were me, and I wanted a reliable van after doing this work I
>would buy a brand new harness to replace this old one.
>
>Take a look at your harness and see what you think.  Check the grounds
>for the fuel pump relay to be sure that it is good.  You want to test
>pins 86 and 87 in the fuel pump relay/ECU power relay box.  These need
>to be good grounds with zero resistance.  Let me know what you find.
>
>--
>Thanks,
>Ken Wilford
>John 3:16
>www.vanagain.com
>Phone: 856-327-4936
>Fax: 856-327-2242
>
>On 4/25/2012 11:47 AM, jesse and monica johnson wrote:
>> Sweet Ken cause i am at a total loss. i am a pretty seasoned vw guy
>> 20+ years and am at my wits end!
>> its an 85 so last of the digijet fuel system. it was a 1.9 that i
>> swapped in a 2.1 go westy engine using 2.1 exhaust conversion kit. but
>> all the coolant/fuel systems are still ol' 1.9 version.
>> Man if you could help me i would mail you some nice homemade cookies!
>> _Jess
>>
>> --- On *Wed, 4/25/12, Ken Wilford /<kenwilfy@comcast.net>/* wrote:
>>
>>
>>     From: Ken Wilford <kenwilfy@comcast.net>
>>     Subject: Re: more information on engine swap/fuel pump woes
>>     To: "jesse and monica johnson" <fowvaydriver@YAHOO.COM>,
>>    VANAGON@GERRY.VANAGON.COM
>>     Date: Wednesday, April 25, 2012, 11:36 AM
>>
>>     Jesse, I looked back through your posts and I could not find what
>>     year your van is and also if you are troubleshooting the digijet
>>     or digifant system.  Let me know and I will try to assist.
>>
>>     -- Thanks,
>>     Ken Wilford
>>     John 3:16
>>     www.vanagain.com
>>     Phone: 856-327-4936
>>     Fax: 856-327-2242
>>
>>
>>
>>     On 4/25/2012 8:55 AM, jesse and monica johnson wrote:
>>     > A little bit more info on fuel pump woes after engine swap.
>>     > So several of you asked for a bit more information on my testing
>>     so that i shall give.
>>     > I went through the testing procedures from the bentley on
>>     checking relays "b" and "c" as the bentley calls them .. or fuel
>>     pump power supply and fuel pump relays in the black box on drivers
>>     side of engine bay.
>>     > I get power on terminal 30 of both relays with key on as it
>>     should be. But the rest of the terminals 85,87 i get none even
>>     with cranking. I did check ALL grounds of both relays and of the
>>     ecu. All are totally fine. Strange note… if i bridge the fuel pump
>>     relay the pump runs fine. BUT if i bridge the power relay for the
>>     fuel pump with the fuel pump relay in which SHOULD make the pump
>>     run also i get nothing. Weird right? I know both relays are good
>>     and have swapped them out to be sure with known good relays. Makes
>>     NO difference.
>>     > Also check all of the terminals on the ecu to be sure everything
>>     is to spec of the various components and all check out. Also
>>     double checked connections on starter. Everything there is a go also.
>>     > So i am at a loss.
>>     > Why would the fuel pump not run if i bridge the power supply
>>     relay next to the fuel pump relay? Should this not kick the fuel
>>     pump on regardless of the ecu being good or bad? Or am i mistaken
>>     in this assumption?
>>     > Any help would be greatly appreciated. If anyone is in the 17363
>>     area code and would be willing to stop by and give it a second set
>>     of eyes i would be ever so grateful. I have done many engine
>>     builds/swaps and have never run into an issue like this. I really
>>     really want to fire up this new engine and get the van back on the
>>     road.
>>     > Thanks so much everyone,
>>     > Jesse
>>     >
>>
>
>
>