Infiniti Q45 (FY33). Manual — part 441
ACCELERATOR CONTROL, FUEL &
EXHAUST SYSTEMS
CONTENTS
PREPARATION . . . . . . . . . . . . . . . . 2
Special Service Tool . . . . . . . . . . . . . 2
Commercial Service Tools . . . . . . . . . . ...2
ACCELERATOR CONTROL SYSTEM . . . . . . ...3
Adjusting Accelerator Wire . . . . . . . . . . ..4
FUEL SYSTEM . . . . . . . . . . . . . . . . 5
Fuel Tank . . . . . . . . . . . . . . . . . .6
EXHAUST SYSTEM . . . . . . . . . . . . . . 7
GI
MA
EM
LC
EC
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
Special Service Tool
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name
Description
KV10114400
(J-38365)
Heated oxygen sensor
wrench
NT636
Loosening or tightening front and rear heated
oxygen sensors
3/8 drive
a: 22 mm (0.87 in)
Commercial Service Tools
Tool number
(Kent-Moore No.)
Tool name
Description
(J-43897-18)
(J-43897-12)
Oxygen sensor thread
cleaner
AEM488
Reconditioning the exhaust system threads
before installing a new oxygen sensor (Use
with anti-seize lubricant shown below.)
a: J-43897-18 (18 mm dia.) for zirconia
oxygen sensor
b: J-43897-12 (12 mm dia.) for titania oxy-
gen sensor
Anti-seize lubricant (Perma-
tex 133AR or equivalent
meeting MIL specification
MIL-A-907)
AEM489
Lubricating oxygen sensor thread cleaning
tool when reconditioning exhaust system
threads
PREPARATION
FE-2
CAUTION:
I
When removing accelerator wire, make a mark to indicate lock nut’s initial position.
I
Check that throttle valve opens fully when accelerator pedal is fully depressed. Also check that it
returns to idle position when pedal is released.
I
Check accelerator control parts for improper contact with any adjacent parts.
I
When connecting accelerator wire, be careful not to twist or scratch wire.
SFE438A
GI
MA
EM
LC
EC
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
ACCELERATOR CONTROL SYSTEM
FE-3
Adjusting Accelerator Wire
CAUTION:
I
Make sure the ASCD wire is not pulling the throttle drum.
I
Refer to EL section, “AUTOMATIC SPEED CONTROL
DEVICE” for ASCD wire adjustment.
SEF793W
MIDDLE THROTTLE DRUM AND THROTTLE DRUM
ADJUSTMENT
1.
Remove the vacuum hose connected to the throttle opener.
2.
Connect suitable vacuum hose to vacuum pump as shown at
left.
3.
Apply vacuum [more than −40.0 kPa (−300 mmHg, −11.81
inHg)] until the throttle drum becomes free from the rod of the
throttle opener.
Make sure that there is clearance between the throttle
drum and rod.
If NG, refer to EC section, “Basic Inspection”.
If OK, go to the following steps.
Middle throttle drum side
4.
Loosen lock nut, and tighten adjusting nut until middle throttle
drum starts to move.
5.
Fasten adjusting nut with lock nut.
Throttle drum side
6.
Start engine and warm it up.
7.
Loosen lock nut, and tighten adjusting nut until throttle drum
starts to move.
8.
From that position turn back adjusting nut 1.5 to 2 turns, and
fasten it with lock nut.
9.
Release vacuum from the throttle opener.
10. Remove vacuum pump and vacuum hose from the throttle
opener.
11. Reinstall the original vacuum hose to the throttle opener
securely.
ACCELERATOR CONTROL SYSTEM
FE-4
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