What 3 prong sensor? The temp 2 sensor is a 2 pin. In addition to the
sensor, the connectors go bad, making poor contact. And of course check
those grounds and use an ohm meter and test out the harness.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
Of Richard Golen
Sent: Tuesday, May 20, 2003 3:16 PM
To: vanagon@GERRY.VANAGON.COM
Subject: 87 EXTREMELY Rich at start-up

Hi,

My 87 is back to one of its nasty behaviors. At start up, for the first
2
or 3 minutes, it is running so rich that it belches black smoke, floods
out
(idle goes from 900 to 100 then 0), actually spits out raw gasoline.
Once
it has been driven for a few minutes, all is well....until it sits for a
couple of hours and is re-started and the problem pops up again.

I have replaced the blue, three pronged temp sensor. The ISV is
functioning
perfectly. What can be the problem??

Ric