These
guides, covering the Q45 from 1990-2005, will assist you in servicing or upgrading your
vehicle. No
guarantees are made on the results, and anything you do yourself
is at your own risk.
Send an instant message on AIM or
AOL to "elwesso69" for immediate help.
General
Diagnosis:
1990-1996
Q45 Parts Diagrams
2002-2005
Q45 Diagnostics
2003
Q45 Service Manual - 2002-2006 Q45.
Resolving
Rough Idle - 1990-1996 Q45. A list of some possible causes and solutions
for rough or erratic idle.
Stalling
- 1990-1996 Q45. One possible transmission-related solution. A
bad MAF is another
common cause.
Resolving
Bucking/Jerking - 1990-1996 Q45. Solutions for erratic acceleration and
bucking/jerking.
See also the
Advice section for general solutions
and information.
Engine/Emissions/Accessories/Ignition:
Resolving
Lifter Ticking - 1990-2005 Q45. Solutions for lifter noise
and ticking sounds.
Plenum
Removal - 1990-1996 Q45. Details on how to
remove your plenum and all services associated with it.
Chain Guides (CRITICAL for 1990-1993):
Chain
Guides Explained - 1990-1993 Q45. Why early Q45 chain guides can result
in engine failure.
Chain Guide
Cutoff Date - 1993 Q45. The late production run of the
1993 Q45 may have the updated metal-backed chain guides.
Chain
Guide Replacement Photos - 1990-1993 Q45. Photos documenting a chain guide update
on a 1992 Q45.
Chain Guide
Parts Diagram - 1990-1993 Q45. Photo diagrams of each
major chain guide part and a picture of the plastic-clogged
oil pickup.
Chain
Guide Replacement Instructions - 1990-1993 Q45.
Instructions and parts list for updating chain guides.
Mass Air Flow
Sensor Cleaning - 1990-1996
Q45. Cleaning the MAF sensor for improved performance,
efficiency, and smoother idle.
Tech Note: MAF connector for 1990-1994 is different from
1995-1996.
Throttle Body
Cleaning - 1990-1996 Q45. Cleaning the the throttle body
for smoother idle and acceleration.
Changing
Spark Plugs - 1990-1996
Q45.
Changing Spark Plugs - 1997-2001 Q45.
Gapping Spark
Plugs - 1990-1996 Q45.
Changing Oil Filter - 1997-2001 Q45.
O2
Sensor Replacement
- 1990-1996 Q45.
Water
Pump Replacement - 1990-1996 Q45.
Replacing Valve Cover Gasket - 1990-1996 Q45.
Tech Note: 1990-1993 use RTV. 1994-1996 use a gasket.
Radiator
Removal/Installation - 1990-1996 Q45.
Checking
Ignition Timing - 1990-1996 Q45. Three ways to check for
proper ignition timing.
Replacing/Dropping
the Oil Pan - 1990-1996 Q45. After a chain guide replacement procedure,
plastic pieces may remain in the oil pan and block the oil
pickup.
Changing Belts - 1990-1996 Q45.
Rebuilding Your Starter - 1990-1996 Q45.
Key
and Lock Issues - 1990-2001 Q45.
Checking
Knock Sensor Resistance - 1990-1996 Q45. How to check for
possible knock sensor failure.
Fuel System
Tech Note:
1990-1993 and 1994-1996 Q45s use different injectors.
Checking
Fuel Injector Resistance - 1990-1996 Q45. How to check for
possible injector failure.
Tips for
Injector Removal/Installation - 1990-1996 Q45.
Fuel
Pump Control Unit - 1990-1996 Q45. Stalls? Humming sound from the trunk?
The fuel pump and control unit may be due for replacement.
Also in the link is advice for how to use an alligator clip to
drive home after a control unit failure.
Fuel
Pump Replacement - 1990-1996 Q45. Humming from the trunk? It is best to
replace the fuel pump before it fails to avoid damaging the
Fuel Pump Control Unit. Used pumps are not recommended.
Fuel
Filter Replacement - 1997-2001 Q45. The fuel filter is not
located under the hood. Here's how to replace it safely.
Fuel Pump
and Control Unit Failure Story - 1990-1996 Q45. Lessons
learned and detailed how-to information on replacing
both.
Fuel Tank Replacement-
1990-1996 Q45.
Pressurized Fuel Rail Flush -
All Q45. Advice on fuel injector cleaning.
Cold
outside. Smells like gas inside. - 1990-1996 Q45. In cold
weather the cabin may smell like gas. Here's a fix.
Transmission:
Adding
An External Transmission Cooler
- 1990-1996 Q45, also recommended for 1997-2001 Q45. Q45 transmissions, while
mechanically
quite reliable, can lack sufficient cooling in their factory
configuration. This documents how to add a transmission cooler
for longer life.
Reprogram
Shift Points - 2002-2004 Q45. An update from Infiniti changes shift points, spark firing timing, and fuel injection timing
for better performance. It also "replaces the accelerator pedal with one with a bit less lag in the pedal itself."
Transmission
Pan Drop
- 1990-1996 Q45. For routine cleaning of the transmission pan and
replacement of the filter.
Servicing
Brakes - 1990-1996 Q45. Detailed information on servicing
pads and rotors.
Braking:
Changing Brake Fluid
- 1990-2001 Q45 and most other Nissan and Infiniti vehicles.
Brake
Pads Worn - 1990-1996 Q45. Disabling the annoying brake pad
error message.
Climate
System:
Temperature
Sensor Cleaning - 1990-1996 Q45. Clean your ambient temperature sensor for
more effective air conditioning.
Evaporator
Cleaning - 1990-1996 Q45. Remove dirt and oil that clogs ventilation
passages to increase cabin airflow.
Intermittent Air Conditioning - 1990-1996 Q45.
Fan Only Blows Full Speed -
1990-1996 Q45.
Replacing Cabin Air Filter - 2002-2006 Q45.
Handling and
Suspension:
Low-Cost Front
Strut Tower Brace - 1990-1996 Q45. Where to acquire and how to install a
low-cost front strut tower brace for better handling and
stability.
Active
Suspension - 1990-1996 Q45a - General information on
upkeep and repairs for the Infiniti Q45a.
Replacing Strut Mounts - 1997-2001 Q45.
Q45 Sway Bar -
1990-1996 Q45. Information on sway bars.
Body, Interior,
and Lighting:
Cleaning
"Piepan" Alloy Wheels
Sagging
Door Fix - 1990-2001 Q45.
Adding
A Cupholder
- How to add a cupholder to 90-93 models that
lacked one.
Full
Dashboard
Removal - 1990-1996 Q45.
Stop Lamp
Inoperative - 1990-1996 Q45.
Radio
and Climate Control Removal - 1990-2001 Q45.
Door Lock Timer Diagnosis and Repair
- 1990-1996 Q45 and other Nissan's
Miscellaneous:
Windshield
Washer Nozzle Cleaning - 1990-1996 Q45.
Audio/Electronics:
All
About Bose - All
Infiniti models. General information
on Bose factory stereo repairs and troubleshooting.
Bose
Speakers and Amps -- 1997-2001 Q45.
Parasitic Battery Drain - All Q45. For resolving trouble
with inexplicably draining batteries.
iPod
Input - 1994-2001 Q45. How to make an iPod input for your
Bose changer-controller head unit.
iPod
Input - 1997-2001 Q45. Where to buy an iPod input for your
Bose changer-controller head unit.
Bose Repair - 1990-1996 Q45.
Checking
ECU Codes - 1990-1996 Q45.
Power
Antenna Problems - 1990-1996 Q45.
Installing
Factory CD Changer - 1994-1996 Q45.
Alarm and Remote Start Wiring
Information - All Q45s
Replacing
Rear Bose Amplifiers - 1990-1996 Q45.
Self-Diagnostic
Displays - 2002-2005 Q45.
Programming Remote Keyless
- 1990-1996
Q45.
Programming Remote Keyless
- 1997-2001 Q45.
Programming Remote Keyless - QX4, 1997-2004 Q45, I30,
I35,1999-2002 G20, FX, G35, M45, Most Nissan Vehicles
G50
Lighting Guide - 1990-1996 Q45. A complete list of
aftermarket part numbers for replacement bulbs. See also for:
J30
and
M35/M45
Wiring
Subwoofer and Amplifier to Bose System
- 1990-1996 Q45.
Cant find what you're looking for?
Send an e-mail to jesda@q45.org
or wes@q45.org. For an
instant response, send an IM on AIM to elwesso69.
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