49 What are the FI types used by VW?
Description
This article is from the Watercooled VWs General FAQ, by Jan Vandenbrande with numerous contributions by others.
49 What are the FI types used by VW?
A: [From TomH] First, let's remember that "CIS" is really Bosch K-Jetronic,
and "CIS-E" is KE-Jetronic. Now, as for the US GTI/GLI injection systems:
83-84 8V K-Jetronic
85-87 8V KE-Jetronic
87-89 16V KE-Jetronic
88-92 8V Digifant II
90-92 16V Motronic
KE-Jetronic is basically a K-Jetronic with ignition control and a knock
sensor, while Motronic has full engine management capabilities.
Note that the above data is for the US GTI/GLI series cars. The US GT/GL
models for example in 85-87 use CIS [kokerj@rpi.edu].
Digifant is a pulsed injection system (rather than continuous, like the
Bosch K series), which is in principle better. I'm no big fan of (at
least the early versions of) Digifant, I don't think it has horrible
reliability problems, either. You *will* need to run injector cleaner
through the engine more frequently, though, or performance and mpg will
drop right off the scale.
[From Jens Knickmeyer]:
The Digifant was developped by VW because the Bosch L-jetronic had
too small arrays, in VWs opinion. So they made their own system and
included the Dignition which lead to the motormanagement system
Digifant. I do not know for other contries, but here in Germany the
system has a communication bus called ABUS (Automubile, Bitserielle
Universelle Schnittstelle - automobile bitserial universal interface).
It is used to connect the diagnostic computer to the Digifant which
has a built-in automatic error detection (can detect defective temp.
sensor and knock sensor. If the latter is detected, the Digifant will
cut off fuel at high loads approx. every 5 secs.). The Digifant uses
ABUS also to exchange data with DIGIFIZ and maybe other future
components.
Polo injection systems:
Engine ID l kW / hp build FI-system
AAK 1.05 33 / 45 11/89- 7/90 Bosch Monojetronic
AAU 1.05 33 / 45 10/90- Bosch Monomotronic
NZ 1.3 40 / 55 2/87-12/90 VW Digijet
AAV 1.3 40 / 55 1/91- Bosch Monomotronic
3F 1.3 55 / 75 10/89- 9/90 Digifant (MAF)
3F 1.3 55 / 75 10/90- Digifant (MAF)
PY 1.3 85 /115 3/87- 7/90 Digifant (MAP)
PY 1.3 83 /113 1/91- 8/94 Digifant (MAP)+knock sensor
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