Chevrolet 1970 Owner's Manual page 69

The chart on the previous page, and the information on the pages
which follow, contains ini'ormation designed to aid the average
driver to discover, and possibly correct, conditions resulting in minor
mechanical difficulties in his car. The chart, designed to point out
possible solutions to several of the most common automotive mal-
functions and point out a logical checking sequence, will lead step
by step to the most likely causes and corrective procedures. If, after
making the checks and adjustments suggested, the source of the
trouble has not been found and corrected, it is strongly recommended
that an Authorized Chevrolet Dealer inspects the vehicle and make
whatever repairs or adjustments are necessary.
FUEL SYSTEM AND ENGINE
If the ignition switch will cause the engine to "turn over" or
"crank" but the car will not start, check Steps A through 0 below.
NOTE: If Continual "flooding" of the carburetor is evidenced by a
carburetor wet with fuel or black exhaust smoke, perform the
operation suggested in paragraph D only.
(A) The flrst and most obvious,
and one of the most frequently
overlooked, items to check when
you have difficulty in starting your
car is the amount of fuel in the
tank. Make it a habit to check the
FUEL GAUGE regularly and most
especially at a time when the en-
gine will "turn over" but will not
start.
(8) If the fuel tank is not empty,
you may check further to see
Checking
Fuel Flow
66
whether the fuel is reaching the carburetor. Disconnect the fuel line
at the carburetor and remove the center (ground the secondary coil
terminal or disconnect the primary wire from the coil to the distribu-
tor at the coil) wire from the coil tower. Place a jar or cup under the
open line and briefly "crank" the engine by means of the starter.
If fuel spurts from the fltting, you may assume that the FUEL LINES
are clear and the FUEL PUMP is operating properly. If no fuel leaves
the line, either the fuel lines or
fuel pump are at fault. See your
Authorized Chevrolet Dealer.
(C) Before reconnecting the fuel
line to the carburetor, remove the
FUEL FILTER from the carburetor
inlet and check its condition. If it
appears to be clean, replace it
and reconnect theroel line. Re-
place the fllter if it appears to be
plugged.
(0) If the fuel seems to be
reaching the carburetor properly,
Fuel Filter
the problem may be: an EMPTY
CARBURETOR BOWL caused by a "stuck shut" carburetor;
a
FLOODED CARBURETOR caused by a "stuck open" condition and
evidenced by gasoline flowing down the outside of the carburetor;
or a stuck CHOKE valve. Remove the air cleaner from the carbu-
retor. Check that the choke valve moves freely and is not stuck.
(Don't mistake normal spring tension for a stuck valve.) Tap the
side of the carburetor sharply several times with a light tool such
as a screwdriver handle or pliers. Replace the air cleaner and
attempt to start the engine in the normal manner.