1975 Datsun 280z FSM - Spooled up Racing

4. Make sure that idle adjust screw
moves smoothly.
5. Adjust throttle valve for fullyclose
position.
6. Push dash pot rod with finger to
ensure that it moves smoothly.
7. Check B.C.D.D. For details, refer
to section EC.
Engine Fuel
17. Checking air leakage
in air intake system
Since the air flow meter used in the
electronic fuel injection system directly
measures the quantity of intake air
to permit the supply of the optimum
fuel quantity for each cylinder, there
should not occur even a slight air leak.
When inspecting the electronic fuel
injection system, pay particular attention
to hose connections, dipstick, oil
filler cap, etc. for any indication of air
leaks.
1 Air cleaner element
2 Air duct (air cleaner to AFM)
3 Air duct (AFM to throttle chamber)
4 Flange (throttle chamber to intake
manifold)
5 Cold start valve mounting surface
6 Blind plug (E.G.R.),
(California models only)
7 Injector mounting surface in intake
manifold
8 Cylinder head mounting surface in
intake manifold
9 Hose (throttle chamber to 3-way
connector), both sides
10
11
12
13
14
15
16
Hose (3-way connector to rocker cover),
both sides
Hose (3-way connector to air regulator),
both sides
Hose (air regulator to throttle chamber
connector), both sides
Throttle chamber connector mounting
surface
Hose (pipe connector to P.C.V. valve),
both sides
Distributor vacuum line
E.G.R. vacuum line (California models
only)
17
18
19
20
21
22
23
24
25
26
Canister vacuum and purge line
Master-Vac line )
,-, , i- r Same vacuum hole
Cooler vacuum line J
Automatic transmission
vacuum line
Pressure regulator vacuum line
E.G.R. valve mounting surface (California
models only)
Oil filler cap
Oil level gauge
Oil seal (on front and rear of crankshaft)
Oil pan gasket mounting surface.
EF416
Fig. EF-94 Checking air leakage in air intake system
18. Checking fuel hoses
Check fuel hoses for leakage, loose
connections, cracks or deterioration.
Retighten loose connections and
replace any damaged or deformed
parts. Replace any rubber fuel hose
whose inner surface is deformed,
scratched or chafed.
When assembling fuel lines, observe
the following:
When connecting injector rubber
hoses to injector, refer to "Injector"
section.
Cautions:
a. Do not reuse fuel hose clamps after
loosening.
b. Clean dust and dirt from parts with
compressed air when assembling.
c. All hose clamps except those used
on the injector positions are 15 mm
(0.591 in). Each clamp has a size
mark on it.
d. When connecting fuel hose to a fuel
pipe of small engagement length,
insert it more than 20 mm (0.787
in) to pipe. Fuel hoses used at such
EF-59
connections are provided with a
white paint mark. Clamp hose on
the white mark.
Service fuel hoses are not provided
with such a white mark. When
connecting a service fuel hose,
clamp hose at the position 3 mm
(0.118 in) from the hose end, after
inserting it about 20 mm (0.787 in)
to pipe. See Figure EF-95. Never
clamp hose on the bulged portion
of pipe.