hoseclamp.jpg hoseclamp_vacuum.jpg hoseclamp_behind.jpg hoseclamp_vacuum_behind.jpg hoseclamp.jpg hoseclamp_vacuum.jpg hoseclamp_vacuum.jpg hoseclamp_vacuum_behind.jpg hoseclamp.jpg hoseclamp_vacuum.jpg hoseclamp_vacuum_behind.jpg hoseclamp_vacuum_behind.jpg

VACUUM HOSES & CONNECTED COMPONENTS GUIDE Return to Boost Leak Location Guide

Below is a complete checklist of devices connected to vacuum along with Nissan diagrams (slight aesthetic/readability modification). You should be able to follow the vacuum lines in your car pretty effectively with these diagrams. Note that ANY OF THESE devices or their associated hose/clamps could be defective/loose resulting in VACUUM/BOOST LEAK! Refer to your engine bay along with these diagrams. Instead of just seeing a tangled web of hoses, you will gain understanding of the vacuum system design, which should help you pinpoint problem areas and facilitate fixes.

The only TECHNICAL change I made is the location of the AIV and EGR solenoids. It has been noted by most Z owners (as they remove their AIV systems) that the AIV solenoid is usually the one located closest to the battery. The Nissan diagram shows the EGR closest to the battery. These valves look identical. You should be able to tell quickly which is which on your car by following the connected vacuum lines to their respective devices. A hose, gasket (to housing), or hose clamp will inter-connect each component to the manifold, air gallery (vacuum hardline), or to another device that can be under vacuum.

Itemized List of VACUUM DEVICES
Includes all items connected by a Vacuum Line
IF YOU THINK OF OTHERS, PLEASE EMAIL ME!
Intake Tract:
  1. Air Filter
  2. Air Flow Meter/Mass Airflow Sensor
  3. Intake Piping
  4. Driver Side Turbo
  5. Passenger Side Turbo
  6. Intercoolers
  7. Driver Side Throttle Chamber
  8. Passenger Side Throttle Chamber
  9. Intake Collector
  10. Intake Manifold

Air Galleries (vacuum hardlines):

  1. Rear Gallery
  2. Passenger Side Gallery
  3. Driver Side Gallery
  4. Fuel Vacuum Gallery
EGR Control Solenoid
EGR Valve
AIV Control Solenoid
Passenger Side AIV
Passenger Side AIV Actuator
Driver Side AIV
Driver Side AIV Actuator
PRVR Solenoid
PRVR Canister
Passenger Side Throttle Chamber
Driver Side Throttle Chamber
Passenger Side Recirculation Valve
Driver Side Recirulation Valve
Factory Boost Sensor
Balance Tube
Passenger Side Valve Timing Solenoid Valve
Driver Side Timing Solenoid Valve
Balance Tube
IAA (Idle Control Valve)
Canister Purge Line
A/C and Heater Control (???)
Clutch Vacuum Assist
Break Vacuum Assist
Driver Side Wastegate
Driver Side Wastegate Actuator
Passenger Side Wastegate
Passenger Side Wastegate Actuator
Fuel Pressure Regulator
Fuel Damper
Air Regulator
FICD (Fast Idle)
All vacuum hoses (too many to list)
Intake Tract Hoses
Turbos
PCV Valve System

To make reading the diagrams below easier, you may want to print out the following numbered list and refer to it as you view the diagrams. The numbers refer to (and point to) vacuum hoses, though it may be a bit tough to see from the wonderful, high resolution of these diagrams (note sarcasm).

  1. PRVR Control Solenoid Valve to Vacuum Tank
  2. PRVR Control Solenoid Valve to Intake Manifold Collector
  3. PRVR Control Solenoid Valve to Fuel Vacuum Gallery
  4. Fuel Pressure Regulator to Fuel Vacuum Gallery
  5. Fuel Damper to Balance Tube
  6. EGR Control Solenoid Valve to Rear Vacuum Gallery
  7. Rear Vacuum Gallery to Passenger Side Vacuum Gallery
  8. EGR Control Solenoid Valve to Passenger Side Vacuum Gallery
  1. Throttle Chamber to EGR Control Solenoid Valve
  2. EGR Control Solenoid Valve to Passenger Side Vacuum Gallery through 3-Way Connector
  3. Air Duct to Right Side Vacuum Gallery
  4. AIV Control Solenoid Valve to AIV Control Valve
  5. AIV Control Solenoid Valve to Passenger Side Vacuum Gallery through 3-Way Connector
  6. AIV Control Solenoid to Balance Tube
  7. Passenger Side Recirculation Valve to Intake Manifold Collector
  8. Passenger Side Wastegate Control Valve to Air Pipe through 3-Way Connector
  9. Passenger Side Wastegate Control Solenoid Valve to Suction Pipe
  1. Passenger Side Wastegate Actuator to Air Pipe through 3-Way Connector
  2. Air Pipe to 3-Way Connector (for passenger side wastegate control)
  3. Driver Side Wastegate Control Valve to Air
    Pipe through 3-Way Connector
  4. Driver Side Wastegate Control Solenoid Valve to Suction Pipe
  5. Driver Side Wastegate Actuator to Air Pipe through 3-Way Connector
  6. Air Pipe to 3-Way Connector (for driver side wastegate control)
  7. Driver Side Recirculation Valve to Intake Manifold Collector
  8. Canister Purge Line

right_view.jpg

left_view.jgp

topview.jpg

PCV Valve System

pcv_system.jpg

INCOMPLETE GRAPHICS -- May be helpful for now, anyway.

iaa_hoses.jpg

front_piping.jpg

vacuum_diagram.jpg

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