Date:         Fri, 3 May 2002 20:19:23 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: What's the diff ?
Comments: To: Barry Mercer <bjmercer@SYMPATICO.CA>
In-Reply-To:  <3CD315C3.A3F4737C@sympatico.ca>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 06:57 PM 5/3/2002, Barry Mercer wrote:
>Excuse the spelling please, but what is the difference between digi-fant
>and digi-jet vanagons ?

The 1.9l motor uses the digijet fuel control system which is essentially a
Bosch L-Jetronic system to control the timing and duration of
fuel-injection pulses.  The 2.1l motor uses digifant I which is a
simplified Bosch Motronic system -- it's similar to digijet except that it
also directly controls ignition timing, whilst the digijet system relies on
a conventional distributor with centrifugal and vacuum advance.  Both
systems use a vane-type air-flow-meter that measures air volume, whereas
later systems use a hot-wire-type air*mass* meter that directly measures
the mass of intake air.  The mechanical wiping contacts in the air flow
meter (AFM) are a source of much trouble to Vanagonians.

david


--
David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"