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Porsche 912E 76 Service Information page 13

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24
ELECTRONIC FUEL INJECTION - AFC
Fuel Injector
The
volume
of injected
length
of
time the injector is
the impulse from the
The
injector
is
connected
(The contro
l
signal
from the
negative
potential.)
Injection Sequence
All
injectors are activated simultaneously, once
every crank
shaft
revolution.
Note
:
The
plug and
socket
can not
be
inadvertanly
of
the MPC
injection.
Pressure Regulator
The pressure regulator regulates the pressure of the
fuel
in
the ring
supply
pressure in the vacuum line.
The
spri
ng chamber of the pressu re regu lator is
connected to the intake
Operation
By using this
configuration
is adj
usted independent
air distributor.
For
example
High vacuum in
the
intake air distributor (idle
intake
air distributor (full
This way, the difference between fuel pressure and
the same
for
all
load
Troubleshooting
:
Con
nect a
pressure
gauge
reg ulator.
Start the
motor.
Nom inal
value
:
2.5 bar (36.75
Reconnect the hose
fuel
is determined
open
(i.
e. the time of
control
unit).
+
to
via the resistor (R).
control
unit is
assembly
is
so arranged that
connected to an injector
line
independent
of
air
distributor via
the pressure of
of
the vacuum in the intake
load) - high
fuel pressure
conditions
of the
engine.
into the ring
supply
psi
approx.)
the fuel pressure must
by the
of
for
it
the
a
hose.
the
fuel
operation) -
low fuel pressure
.
intake air
distributor
line. Disconnect
the
now
be lower.
11
.
Low vacuum
pressure
always remains
vacuum hose from th
in the
e pressure

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