Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1920-07-18
LESSONS IN
CARE OF AUTOMOBILE
;xpcrt Gucrrlich Concludes Lecture
on Subject OF Trouble
Locating.
iBT FREDERICK q. GUERRLICH.


lBY FREDERICK q. GUERtLiCH.
Lecture No. 202.
IT your engine misses, find out why
nj correct the fault Immediately.
i.unnlng car with Il missing engine
leans a very severe strain on all the
Iiarts OF 1t.
Whom the engine misses the nrst
ing to do Is TO and out which cyiin-
Ter Is missing. This can best be done
lily making the cylinders mis-. o"n
fac spark plugs Thus. IL you were
short-circuit the spark plug OF
|tyiinder No. !. you would prevent the
kpark. and II the cylinder was not
| Kissing before II viii now miss. and
he missing OF the engine Will be
Dubbed On the other hand. II No.
n cylinder VAS missing, you could not
\ AXE /, miss. ana there will be no
OFF you Short-c!rcuit the plugs one
\ tier the other you VIII finally come
|Io one which. when short-circu!ted.
Hill not cause the engine 10 run d!t-
crentiy than before. This Ia tho
|! Kissing cylinder.
How to short-CircuIt Plug.
/ The Illustration shows how to
hor,-clrcuit the plugs. By touching
screw driver to the plug and IN:
ground" as shown. the current VIII
% through the screw driver and not
trough the plug. and 50 there Viii
| OF be a SPARK.
Il Or the three essentials. Ignition or
compression are generally the cause
H. missing
Il I told you that fault In the prl,n-
Try circuit is liable TO be the cause
{ an engine suddenly stopping. and
L nat the secondary circuit was un-
ikeiy 10 be at fault With Il MISC.
he reverse Is true. as II the pe.nary
/ lrcuit fails. II wIii cause n failure
Ii'f the spark In all the cylinders and
Hot In one only.
\ what are the units in the, secondary
li,ircuIt? The coil. distributor and
park Plug. More than 50 per cent
III The time miss is cue to a de-
ec,ive spark plug
\ The way 10 proceed then. when your
t.nginc misses. Is 10 locate the cy!in-
Ter which Is missing. and then take
he lead twire) of the plug and hold
I n short distance from the metal Of
he engine. II you get spark. take
hut the, plug and either replace or
Joints and see II the miss disap-
lcarS. II the miss does not disappear.
\ hen you mus; expect that loss OF
compression is the cause
\ J: you do not &c; a spark when
iou test the lead the trouble Is prob
tb!y due 10 the lead being short-c!r-
.uited. In most or our cars. these
eads, for nca,ncss sake. are carried
\ shield or casing. and. due TO the
Vibration OF the car. The insulation
I)ftcn IS worn on where the lead en-
\ .ers or leaves this casing An exam
nation vii! show this. and a tenn
Nlorary repair can be made by wrap
Ding the wire with insulation tape
Loose wire May lie Trouble.
\ y loose primary wire. pitt"d or I'm.
baroperiy set intcrruptcr points VIII
often cause miss. but the miss vii.
Generally nc irregular: that Is. nrSt
\ in one cylinder and then In another.
ior perhaps every four or Ave revolu-
lions.
Ignition being o. *. wa mus; e1-
lpect loss OF compression 10 b. the
trouble. To see II you have loss OF
Icompression 70 any extent in the
missing cylinder. open all OF the COM
lpress!on cocks. and then close one on
one 81 the hitting cylinders II you
VIII then slowl; crank the engine you
VIII be able 10 feel the conprcrrio u
IoDeI ;tle compression cock aud close
tina, ON the missing cylinder. you
Iwtil he able 10 compare the COM
preston In IL 20 that OF the former
Having de,erminca that compress
sion is AT fault. nrst test the waive
caps and spark plugs by pouring OIL
about ;hGm and watch for the buh-
II the valve adjusting nut Is not up
ton light. ns IL may have worked NJ.
Next See that the valve !s not stick :
Ing and that the valve sp:!ns Is not
broken.
This failing 10 show n fault. the
valves need grinding, or the piston
rings ARE leaking. .Ns n rule. you viii
know whether or not the wives need
TO b" ground. as this must be done in
the ncighborhOnd Of every ono mile :
o! running. when the piston rings
of one cylinder leak. you VIII hear
a sort OF ,nutt!ed kissing sodnd when
climbing 4 hill.
A bll mixture viii cause a miss.
but the miss is generally an irregular
one. The adjustment o! the carburc-
tor Is liable 10 be the cause, hut !.
your adjustments were right yeStcr-
day. they will be right today. unless
they have been tempered with Tin
less you feel sure that the adjust
yutnts are wrong do not touch them.
The adjustment VIII have to be n
little different in the winter than in