52
TROUBLE SHOOTING
Fuel Injected Engine
1. Engine fails
to
start even
though
cranked
by
starter
at
normal
speed.
a. Check that there is
fuel in the tank and that the
charge
indicator
lamp lights up when the
ignition
is switched on.
b. Disconnect the cables from one spark plug at a
time
and
operate the starter. A spark
should
then
jump
the
gap
when the cable is held close (approx.
Va
")
to
the
terminal
on the plug.
c.
If
only
a feeble spark is obtained,
or
none at all, check
whether the
ig
nition cables are
properly
plugged
into
the
ignit
ion coil and the
distributor
. Check the
low
volt-
age
connections
to the
ignition
coil.
d. Take
off
the
distributor
cap and wipe
off
any
mois-
ture. Check that the cap is
not
cracked and that the
breaker
pOints open when the engine is cranked. Clean
the contact surfaces.
e.
If the engine has been cranked
for
some
time
without
firing, fuel mixture may have flooded the
cylinder
and
fouled
the spark plugs. Unscrew the spark plugs and
blow
the cylinders clean
by
cranking
the engine with the
starter. Dry the plugs and check that the electrode gap
is correct,
or
fit new plugs if available. .
2.
If
the engine still refuses to start,
check
the fuel
system.
a. Check whether the fuse
for
the electric fuel
pump
(fuse
No.8)
is intact. Scrape
off
any
oxide
deposits by
rotating
the fuse a few times in its
holder
. (It is usually
possible to hear whether the fuel
pump
is
working,
as
it
runs
for
about one second when the
ignition
is switched
on before
stopping
automatically).
b.
Check whether the cable terminals are
properly
plug-
ged
into
the pressure transmitter (located forward on the
left wheel housing), the
coolant
temperature
transmitter
(located under the intake manifold) and the starter motor.
These terminals are designed to
fit
one
way
only
and
must not be pushed in by force.
c. Check the wiring
connection
to the fuel
pump
(ac-
cessible
through
a lid in the
floor
of
the trunk).
d. Check that none
of
the hoses in the fuel system has
worked loose.
e. A simple check on the operation
of
the
injection
sys-
tem can
be
made
as
follows:
SWitch on the
ignition
(key to
K)
. Open
the
hood
and
work the throttle
control
up and
down
. A
clicking
sound
should then
be
heard from
two
of the
injection
valves.
To cut in the other two injection valves, the engine must
be
cranked one revolution.
3.
Engine misfires,
power
is lost
or
engine runs
roughly.
Check that:
a. None
of
the ignition cabl
es
has worked loose.
b.
None
of
the spark plugs is defecti
ve
or
in need
of
adjustment.
c.
There is no arcing in the
ignit
ion system.
d. There is good contact in the
low-voltage
connect
ions
to the i
gnition
coil.
e.
None
of
the injection valve cables have
worked
loose.
4.
Charge
indicator
lamp
fails to
light
up
when
ignition
is
switched
on. Possible causes:
a.
Discharged battery
or
loose battery cable.
b.
Burnt-out fuse for charge
indicator
light.
c.
Poor wiring
contact
at
ignition
switch
or
charge
indicator
lamp.
d.
Burnt-out
light
bulb.
c.
Wiring to voltage regulator open circuit.
5.
Charge
indicator
lamp
lights
up
when engine is
running. Possible causes:
a. Broken
or
slack alternator drive belt.
b.
Defect in voltage regulator.
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