Date:         Fri, 16 Oct 2009 14:26:04 -0400
Reply-To:     jeffmichal@GMAIL.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jeff Michal <jeffmichal@GMAIL.COM>
Subject:      Start Idle Issue
Content-Type: text/plain; charset="US-ASCII"

Hi everyone.  Could use some public review of a problem I'm having with my
90 GL Vanagon.  It's got the stock 2.1 liter engine, ~130k on it.



I am seeing an issue with the engine idle immediately after start.  The
engine seems to run rough for a short time, the amount of time seems
dependent on the engine temperature.  If the engine is warm, the rough
running lasts for 1-2 minutes.  If the engine is cold, the time is pretty
much 1 or 2 minutes after the engine heats up to halfway to the LED on the
temp gage.  During this time, the engine is idling about 650-700 rpm.  If I
give gas, the engine seems to flood and try to die.



Recently I have had to replace the throttle linkage and all 4 fuel
injectors.  The problem came about after the fuel injectors were swapped
out.  From what I know about the efi, it has a short period (1-2 minutes)
where it runs in an open loop prior to engaging the mass airflow sensor and
entering a closed loop with managed air and fuel volumes.  It seems to me
this open loop period is where the problem must be, but I'm not sure how to
resolve it.



Any ideas are appreciated.



Jeff Michal