Chevrolet 1977 light duty truck, Руководство по обслуживанию

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V IE W C
ENGINE
a
V IE W A
OPTIONAL
V .I.N . LOCATION
Fig. 6A-2--VIN Locations (M K IV V-8)
h. Inspect carb u reto r fuel filter for presence o f
w ater a n d / o r im purities an d correct as necessary.
i. Check carb u reto r m o u n tin g gasket for air leaks.
R ep air as necessary.
j. Check distributor spark advance m echanism for
pro p er operation. R ep air or replace as necessary.
k. Inspect valve train components. Adjust, rep air
a n d / o r replace as necessary.
1. Check engine for low compression. R epair as
necessary.
ENGINE MISSES AT
a. Inspect carb u reto r fuel filter fo r presence o f
w ater a n d / o r impurities. Correct as necessary.
b. Check fuel system fo r leaks, plugged fuel lines,
incorrect fuel p u m p pressure a n d / o r plugged carburetor
jets. Correct as necessary.
c. Check ignition timing. Correct as necessary.
d. Check for excessive play in distributor shaft.
R e p a ir or replace as necessary.
e. Check for weak or faulty H.E.I. system coil as
outlined in Section 6D o f this m anual.
f. Check, inspect and reg ap spark plugs. Replace
as necessary.
g. D e to n atio n an d pre-ignition m ay be caused by
using su b -sta n d a rd fuel. Correct as necessary.
ENGINE
a. Check carb u reto r for incorrect a n d / o r misad-
justed idle speed, float level, leaking needle and seat, air
valve, sticking choke or e n r ic h m e n t system an d
secondary vacuum break operation. Adjust, rep air or
replace as necessary.
m. Check operation o f exhaust gas recirculation
valve. R ep air or replace as necessary.
n. Check ignition timing, and condition o f ignition
system as outlined in Section 6D o f this m anual. Correct
as necessary.
0. Check for vacuum leaks. Correct as necessary.
p. Check operation o f E FE valve as outlined in
Section 6E o f this m anual. R ep air or replace as
necessary.
VARIOUS SPEEDS
h. Check for weak valve springs and condition o f
cam sh aft lobes. R e p a ir or replace as necessary.
1. Check engine operatin g tem perature. Correct as
necessary.
j. Check operatio n o f exhaust gas recirculation
valve. R ep air or replace as necessary.
k. Inspect distributor cap for evidence o f carbon
tracking. Replace if necessary.
1. Check for faulty altitude com pensator and
incorrect carburetor adjustm ents. Correct as necessary.
m. Check for vacuum leaks. Correct as necessary.
n. Check operation EFE valve as outlined in
Section 6E o f this m anual. R ep air or replace as
necessary.
STALLS
b. Inspect c arburetor fuel filter for presence o f
w ater a n d / o r im purities. Correct as necessary.
c. Check H.E.I. system as outlined in Section 6D o f
this manual.