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INTRODUCTION
- General Precautions
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-
GENERAL
PRECAUTIONS
1. Know
the
importance
of
periodic maintenance.
(a)
Every service item in the periodic maintenance list
must
be performed.
(b) Fai ling
to
item can cause the engine
to
run
poorly
and increase exhaust emissions.
2. Listen
to
the
customers
comments
carefully.
Always
determine exactly
what
the
customer complaint
is,
if
any, and
verify
it
before
proceeding
with
repairs.
3.
Determine
if
you
have
an
engine
or
emission system
pro-
blem.
(a)
Engine problems
are
usually
not
caused
by the emis-
sion control systems.
(b) When troubleshooting, always check
the
engine and
the
ignition system first.
4. Check hose and wiring connections first.
The
most
frequent cause
of
problems
is
simply a bad con-
nection
in
wiring or vacuum hoses. Always make sure
that
connections are secure and correct.
5. Observe
the
following precautions
to
avoid damage
to
the
parts:
(a)
To
disconnect vacuum hoses, pull on
the
end,
not
the
middle
of
the
hose.
(b)
To
pull apart electrical connectors, pull
on
the
con-
nector itself,
not
the
wires.
(c
)
Be
careful
not
to
drop electrical components, such as
sensors
or
relays.
If
they
are dropped
on
a hard floor,
they
should be replaced and
not
reused.
(d)
When steam cleaning an engine,
protect
the
distri-
butor,
coil, air filter, carburetor intake, air
pump
and
VCV
from water.
(e) Never use an i
mpact
wrench
to
remove or install
thermo
switches
or
thermo
sensors.
(f)
When checking
continuity
at
the wire connector,
insert
the
tester probe carefully
to
prevent termi
na
ls
from bending.
(g)
When using a vacuum gauge, never force
the
hose
onto
a
connector
that
is
too
larg
e.
Use a step-down
adapter
instead. Once
the
hose has been stretched, it
may
leak.
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