Running rich just after a start or hard starting when warm often indicates a problem with the Temp 2 sensor or wiring. The connection for this sensor is a common problem. Bad wiring/grounds can create all sorts of havoc with this sensor. 

Dennis
 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Bob Anderson
Sent: Friday, August 09, 2013 7:43 AM
To: vanagon@GERRY.VANAGON.COM
Subject: '87 2.1 Engine running rich

Hi,
I have a question regarding my 2.1 engine running rich when first started and then seems to smooth out when warmed after about 10 minutes, however yesterday , after I had driven home from work, about 5 miles, I turned the key off and then restarted the engine and it started running rough again, a little exhaust smoke and that exhaust odor of running rich, and then stalled.
I just installed this engine a few weeks ago after a winter project of replacing the head gaskets and I now have just over 200 miles on it from short trips back and forth to work. This engine is new to me, as I bought it from someone last year who did a conversion.
Your suggestions and advice is much appreciated.
Thanks,
Bob Anderson
'86 Vanagon GL
Wilmington, MA