Look for a really large vacuum leak like the boot came off the air flow meter or throttle body. It sounds like it is starting on the cold start valve and then running out of fuel. 

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Christophe Guilbert
Sent: Monday, July 27, 2015 1:25 AM
To: vanagon@GERRY.VANAGON.COM
Subject: help , video to help diagnose my Westphalia air cool 1993 problem.

Dear list !

Could you guys please watch those short youtube video to help me diagnose my van problem .
I have an air cool engine 2.0L 1983.

Symptom: basically the engine start , but stall after a few second.
I have so many things to check out but I would be very glad if anyone by luck can diagnose and pin point the problem just by listening those video.

Tip ! The engine was rebuilt and was working fine a week ago before I did some electrical modifications to add a secondary battery !
I don't think I I messed up anything but who knows !.

https://youtu.be/VQ_Auha-rV8
https://youtu.be/Ax4g5CNPCJU

Thanks so much

Chris