NISSAN 300ZX 1984 Z31 Engine Control Workshop Manual

ENGINE CONTROL, FUEL &
EXHAUST SYSTEM1
SECTION FE
CONTENTS
ENGINE CONTROL SYSTEM
FUEL SYSTEM
.
EXHAUST SYSTEM
.. ...
.. . ...
FE-2
FE-3
FE-5

ENGINE CONTROL SYSTEM
Accelerator Control System
a Check to see if throttle valve fully opens when accelerator pedal is fully depressed and if it returns to idle
when released.
b. Adjust
accelerator pedal
free play by turning adjusting nut.
c On
automatic transmission models, make
sure kickdown switch rod is fully pushed in when accelerator
pedal is depressed completely
d
ON A.S C.D equipped models, first adjust accelerator wire and then A S C.D cable. For details, refer to
"Automatic Speed Control Device" in EL section
e Check accelerator control parts for improper contact with any adjacent parts
f When connecting accelerator wire, be careful not to twist or scratch its inner wire.
g Apply
a light coat of recommended multi-purpose grease to all sliding or friction surfaces Do not apply
grease to wire
AS C D anuator
Bushing IReplacel
(D)20-40(31-41.22 30
4 - 5 IO 4.0.5.2 9 .3.61 Klckdown switch IA/T)
Frar play at pedal
Bushing IReplacel
(D)20-40(31-41.22 30
Ickdown switch IA/T)
Frar play at pedal
0 N m Ikgm,ft-lbl
pad comer 1 -2mm IO 04.0 08 ml
SFE753

FE-2

FUEL SYSTEM
WARNING:
When replacing fuel line parts, be sure to observe
the following.
a. Put a "CAUTION. INFLAMMABLE" sign in workshop.
b. Be sure to furnish the workshop with
a C02 fire extinguisher.
c. Be sure to disconnect battery ground cable before conducting operations
d Put drained fuel in an explosion-proof container and put lid on securely.
CAUTION :
Before disconnecting fuel hose, release fuel pressure from fuel he. Refer to the "Releasing Fuel Pressure"
a Do not disconnect any fuel line unless absolutely necessary.
b. Plug hose and pipe openings to prevent entry of dust or dirt
c. Always replace O-ring and clamps with new ones
d.
Do not kink or twist hose and tube when they are installed.
e Do not tighten hose clamps excessively to avoid damaging hoses.
f When installing fuel check valve, be careful of its designated direction (Refer to section EC).
g. Run
the engine and check for leaks at connections
FE-3

FUEL SYSTEM
Removal of Fuel Tank
Do not separate fuel tank and fuel filler tube ex-
cept when replacement is necessary.
1 Disconnect harness connectors of fuel tank
gauge unit and electric fuel pump in luggage
compartment
Siphon or pump fuel from filler opening of fuel
tank into
a suitable container Then blow away
fuel from filler opening with compressed clean
air
Remove fuel filler neck ring
2
3
"1 1
Do not strike with hammer and tool SFE756 /
4
5
Remove rear right side wheel
Remove fuel filler tube protectors and discon-
nect ventilation hose
- SFE755
6. Disconnect fuel hoses and evaporative hose on
fuel tube side.
7 Loosen bolt and nut securing mounting bands
and then remove fuel tank with filler tube.
8 When installing fuel filler neck ring tighten as
follows~
-Filler tube
/,/I' SFE765
-Removal of Fuel Gauge Unit-
Lift fuel gauge unit straight up off the fuel tank
Resistor gauge
is made of ceramic material. Be
careful not to bend it.
SFE757
-Removal of Electric Fuel Pump-
Remove fuel tank, then detach fuel pump
FE-4

EXHAUST SYSTEM
CAUTION.
Be careful not to drop or damage catalytic converter.
Never wet catalytic converter with water, oil, etc
When removing muffler assembly, always separate
it from center tube
On non-turbocharger models, when removing heat shield plates from front tube, remove the entire front
tube assembly
After installation, check that mounting brackets and mounting insulator
are free from undue stress If
any of above parts
is not installed properly, excessive noises or vibrations may be transmitted to vehicle
body
When connecting center tube and muffler assembly,
use the Genuine Nissan Sealant "Exhaust Sealant Kit
20720.N2225" or an equivalent to eliminate gas leakage at the joint
Check
all tube connections for exhaust gas leaks, and entire system for unusual noises, with engine
running
FE-5

EXHAUST SYSTEM
FE-6