Cleaning Plug Electrode; Spark Plug Inspection - Lincoln Continental 1964 Shop Manual

9-20
FIG. 37-
Cleaning Plug
Electrode
To replace the resistance wire:
1. Remove the instrument panel
lower covers.
2. Disconnect the resistance wire
(pink or black) from the multiple
molded connector at the Power Box.
This connector is the second from
the top of the Power Box, and the
pink or black resistance wire plugs
into the upper right corner of the
connector.
3. Cut off the old resistance wire
at the point where it enters the main
( 1440 1 ) wiring loom.
4. Connect the replacement (pink
or black) wire to the multiple con-
nector at the Power Box.
5. Route the replacement wire as
straight as possible under the instru-
ment panel, to the connector near the
ignition switch.
6. Disconnect the old wire at the
quick disconnect (red wire with green
connector) near the ignition switch
and connect the replacement wire.
7. Cut off the old resistance wire
where it enters the main wiring loom.
8. Tape the replacement wire to
the main wiring loom.
GROUP
9-IGNITION
SYSTEM
{196)
CONDITION
CONDITIONS
~
NORMAL
CONDITIONS
d
CARBON
FOULING
~
SPLASHED
FOULING
IDENTIFICATION CAUSED BY
Wet, sludgy deposits. Excessive oil entering combustion
chamber through worn rings and
pistons, excessive clearance between
valve guides and stems, or worn or
loose bearings.
Dry, black, fluffy de- Incomplete combustion caused by too
posits. rich a fuel-air mixture or by a defec-
tive coil, breaker points or ignition
cable.
White, burned, or
blistered insulator
nose and eroded elec-
trodes.
Inefficient engine cooling, or engine
overheating caused by improper igni-
tion timing, wrong type of fuel, loose
spark plugs, or too hot a plug, low
fuel pump pressure.
Rusty brown to gray- Regular or unleaded gasoline.
ish-tan powder deposit
and minor electrode
erosion.
White, powdery de- Highly leaded gasolines.
posits.
Hard, baked on black Too cold a plug. Weak ignition, de-
carbon. fective fuel pump, dirty air cleaner,
too rich a fuel mixture.
Hard and scratchy Formed when fine sand particles com-
bine with anti-knock compounds in
the fuel. Most common industry
areas. The plugs cannot be cleaned.
Deposits, accumulated after a long
period of misfiring, suddenly loosened
when normal combustion chamber
deposits are restored after new p\ugs
are installed. During a high speed
run these deposits are thrown into
the plug.
81005-E
FIG.
38-Spark Plug Inspection