Nissan Maxima QX

since 1993 release

Repair and operation of the car


Nissan Maxima QX
+ Cars of the Nissan Maxima brand
+ Maintenance instruction
+ Settings and routine maintenance
+ Engine
+ Cooling systems, heating
- Power supply system and release
   General information
   Dropping pressure in a power supply system
   Check of serviceability of functioning of the fuel pump, measurement of pressure of fuel
   Check of a state and replacement of fuel lines and their nipple connections
   Removal and installation of the fuel pump
   Check of a state and replacement of the sensor of fuel consumption
   Removal and installation of the fuel tank
   Cleaning and repair of the fuel tank - general information
   Removal and installation of assembly of the air cleaner
   Removal, installation and adjustment of a cable of an accelerator
   System of electronic injection of fuel (EFI) - the general information
   Check of serviceability of functioning of system of injection
   Check of a state and replacement of the case of a throttle
   Removal and installation of the regulator of pressure of fuel
   Removal and installation of the fuel highway and injectors of injection
   Check and adjustment of turns of idling
   System of release - the general information
+ Engine electric equipment
+ Control systems of the engine
+ Transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Check and adjustment of turns of idling

Turns of idling is called the frequency of rotation of the engine at the released accelerator pedal (for example, at a stop on the traffic light). This parameter is critical grindings of sight of efficiency of return of the engine and functioning of its many subsystems. Before starting measurement of turns, make the following checks:

a) Check passability of the filtering air cleaner element;
b) Check an inlet air path for existence of signs of leaks;
c) Make sure of lack of signs of losses of depression through vacuum hoses;
d) Check a condition of the battery and serviceability of functioning of system of ignition, including installation of a corner of an advancing of ignition (see the Head Nastroyki and routine maintenance);
e) Check fuel pressure (see the Section Check of Serviceability of Functioning of the Fuel Pump, measurement of pressure of fuel);
f) Check compression pressure in cylinders (see the Part the General capital repairs of the engine of the Head Dvigatel);
g) Check a condition of the EGR and EVAP systems (see the Head of the Control system of the engine);
h) Check TPS adjustment (see the Head of the Control system of the engine);
i) Check onboard system of self-diagnostics for existence of the codes of malfunctions which are written down in memory (see the Head of the Control system of the engine).

CHECK

 PERFORMANCE ORDER

1. According to instructions of manufacturers connect a manual tachometer to the engine.

On models since 1995 the issue where the system of ignition without distributor for connection of a tachometer is used is provided the special socket which is switched on in an electrical wiring plait in the right part of a motive compartment.

2. Reliably cock the parking brake and prop up antiretractable boots back wheels. Transfer transmission to situation "P" or "N". Disconnect everything consumers of the electric power. On models 1993 and 1994 of of the issue remove the panel of access to RSM (see the Head of the Control system of the engine).
3. Start the engine and warm up it up to the normal working temperature. Having established the frequency of rotation of the engine in 2000 rpm, three times quickly lift it to value of 3000 rpm, then let's the engine work within about a minute on single turns.
4. On models 1993 and 1994 of of the issue turn out the selector of the choice of the modes on RSM wall against the stop clockwise (see the Head of the Control system of the engine).
5. On models since 1995 of the issue kill the engine and disconnect an electrical wiring from the sensor of provision of a butterfly valve (TPS) (see the Head of the Control system of the engine). Again start the engine and lift the frequency of its rotation to value over 3000 rpm three times, having in conclusion returned to single turns.
6. Read out value of turns of idling from a tachometer and compare result of measurement to requirements of Specifications or data of a label of VECI.

In case of discrepancies preference should be given to data of VECI.

ADJUSTMENT

 PERFORMANCE ORDER

1. At excessively low or high turns of idling it is necessary to make their adjustment by means of the special adjusting screw.

You do not make attempts to adjust idling turns by means of the lock screw having factory installation located on the throttle case.

2. On models 1993 and 1994 of of the issue turn against the stop counterclockwise the selector of the choice of the RSM modes, then kill the engine.
3. On models since 1995 of the issue kill the engine and connect an electrical wiring to TPS.
4. Disconnect a tachometer.