Table of Contents
Advertisement
30
DIAGNOSIS GUIDE
Conditions
ond Proboble
Couses
Hord Storting
lncorrect Choke
Thermostot
Adiustment
lncorrect
ldle
Adiustments
Binding Linkoge, Choke Plote,
or
Choke
Piston
Restricted
Choke
Vocuum
ond Hot
Air
Posso
ges
Cleon
Corburetor
with
Solvent
ond
Blow
Out
Possoges
with
Compressed
Arr.
Air
Leoks
lnto
Vocuum
ond Hot
Air
Possoge
lmproper
Fuel
Level
Dirty,
Worn,
or
Foulty Needle
Volve
ond
Seot
Floot
Sticking
lnodequote
Unlooder
Adjustment
Rough
ldle ond
Stolling
lmproper
ldle
Adiustments
Domoged
Tip
on
ldle Mixture
Screws
Clogged
Air
Bleeds
or
ldle
Possoges
Cleon
with
Solvent
ond
Compressed
Leoking lntoke
Monifold
ond
Corburefor
Goskets
Throttle
PIotes
Not
Closing
lmproper Throttle Stop
Adiustment
lmproper
Fuel
Level
lmproper
Fost
ldle
Com
Adjustment
Dirty
Air
Cleoner
Improper
Choke
Setting
Choke
Binding
Poor
Low-Speed
Operotion
Clogged ldle
Tronsfer
Slots
Remove
ond Cleon
Corburetor
with
Solvent
ond
BIow
Out
Slots
with
Compressed Air.
Restricted
ldle
Air
Bleeds ond
Pcrssoges
Remove
ond Cleon
Corburetor
with
FUEL
-
CARBURETION
_
EXHAUST
Solvent.
Blow
Out
Possoges
wiih
Compressed Air.
Dirty
or
Restricted
Air
Cleoner
lmproper
Fuel
Level
Foulty
Accelerotion
Improper
Pump Stroke
Inoperotive Pump Dischorge
Check
Boll
or
Needle.
Worn
or
Domoged
Pump Diophrogm
Leoking
Moin
Body Cover
Gosket
Engine
Cold
ond
Choke
Too
Leon
lmproper Metering
Rod
Adiustment
Surging (Cruising
Speeds
to
Top
Speeds)
Clogged
Moin
Jets
Cleon
Moin
Jets
with
Solvent
ond
Blow
Out
Jets
with
Compressed Air.
Undersize
Moin
Jets
Low Fuel
Level
Low Fuel Pump
Pressure
or
Volume
Blocked
Air
Bleeds
Cleon
with
Solvent
ond
BIow
Out
Bleeds
with
Compressed Air.
Clogged Fuel Filter
Screen
Dirty
or
Restricted
Air
Cleoner
Metering
Rod
Not
Adiusted
Properly
Reduced
Top
Speed
Low Fuel
Pump
Volume
Clogged
Vocuum
Possoge
Cleon
with
Solvent
ond
Blow
Out
Possoge
with
Compressed
Air.
lmproper
Size
or
Obstructed Moin
Jets
Foulty Choke
Operotion
Clogged
Secondory
Metering
Possoges
Cleon
with
Solvent
ond
Blow
Out
with
Compressed Air.
Leoking
Secondory
Throttle Operoting
Diophrogm
or
Housing Gosket
Air
Leok
ot
Secondory Metering
Body Gosket
Dirty
or
Restricted
Air
Cleoner
Secondory Linkoge,
Throttle
Plotes,
or
Shoft
Binding
Throttle Linkoge
Not
Properly
Adiusted, Restricting
Full
Trovel
Portiolly
Restricted
Exhoust
Pipe,
Muffler,
or Toil
Pipe
Poor Gos
Mileoge
Restricted
Air
Bleeds
Cleon
with
Solvent
ond
Blow
Out
Bleeds
with
Compressed
Air.
lmproper
Fuel
Level
Dirt
Under
Fuel
lnlet
Needle
Cousing Flooding
Dirty
or
Restricted
Air
Cleoner
lmproper
Jets
Accelerotor
Pump Dischorge
Boll
or
Needle Not
Seoting
Metering
Rods
Not
Adusted Properly
Oversize
Tires
(Snow
Tires)
Reploce Speedometer
Driven
Geor
to
Compensote
for the
Lesser
Revo-
lutions Per
Azlile.
lmproper
Speedometer
Driven
Geor
Brokes
Drogging
Spork
Retorded
Burnt,
Worn
Spork Plug
Electrodes
Thermostot (Engine
Operoiing
Temper-
otures
Below Normol)
Leoks
ot
Fuel Line Connection
Underinflotion
of
Tires
lmproper Toe-in
Adustment
Heovier
thon
Recommended
Lubri-
conts
in
Engine, Tronsmission
or
Differentiol
NOIE: Ihe
mosi
common
couse
for
poor gos mileoge
is
due
lo
poor driving hobiis
ond
condi-
iions.
To
obtain moximum
f
uel
economy, the
cor
musl
be
in
prop-
er
mechonicol condition
which
con
be
defermined
by
a
gos
rni/eoge
lesfer
ond the driver willing
ond
ob/e
lo
employ
proper
driving
tech-
nique.
Advertisement
Table of Contents
