Jeep Grand Cherokee

1993-1999 of release

Repair and car operation



Jeep Grand Cherokee
+ Cars of mark Jeep Grand Cherokee
+ Options and routine maintenance
+ Рядный the six-cylinder engine
+ Engine V8
+ Procedure of the general and engine major repairs
+ Systems of cooling, heating and air conditioning
- The power supply system and release of the fulfilled gases
   The general information
   Procedure of dump of pressure of fuel
   Check of pressure of fuel and functioning of the fuel pump
   Removal and installation of a fuel tank
   Cleaning and repair of a fuel tank - the general information
   Repair and replacement of fuel lines
   Removal and installation of the fuel pump
   Check of serviceability and replacement of the block of the gauge of level of fuel
   Removal and installation of assemblage of an air cleaner
   Replacement of a cable of gas
   System of injection of fuel - the general information
   Check of serviceability of system of injection of fuel
   Serviceability check, removal and installation of the case of a throttle
   Check of serviceability and replacement of a regulator of pressure of fuel
   Serviceability check, removal and installation of injectors of fuel
   Check of functioning and replacement of components of system of stabilisation of turns of idling (IAC)
   Service of system of release of the fulfilled gases - the general information
+ System of an electric equipment of the engine
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ Manual box of a gear change
+ Automatic transmission
+ Distributing box
+ Coupling and трансмиссионная a line
+ Brake system
+ Suspension bracket and steering
+ Body
+ System of an onboard electric equipment
+ Controls and operation receptions

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Serviceability check, removal and installation of injectors of fuel

The prevention in the beginning see Procedure of dump of pressure of fuel Has undressed.

Check

 PERFORMANCE ORDER

  1. Start the engine and warm up it to normal working temperature.
  2. At the engine working on idling on one disconnect each of injectors. Watch thus changes of turns of idling of the engine. If falling of turns of the engine almost equally at a detachment of an injector of each of cylinders, injectors as it should be also function regularly. If switching-off any of injectors does not lead to falling of turns of the engine, pass to performance of procedures of following point.

For рассоединения electric sockets of injectors it is required to give nuts and to raise a highway of a lining of a plait of wires.

  1. Switch off the engine Disunite an electric socket of a suspected injector and measure resistance between two plugs of a socket (from outside an injector) (see an illustration).
  2. Resistance should equal approximately 12.4 Ohm. Otherwise replace an injector.
  3. If resistance of an injector lies in admissible limits, it is necessary to take advantage of the voltmeter with a high impedance or a special control lamp for check of a plait of wires of injectors (ask in shops of automobile accessories) (see an illustration).
    • If pressure on a socket periodically changes from zero to 2 In (or the blinking of a control lamp 0, an injector food in norm takes place.
    • If pressure is absent, check up a plait condition (the Head System of an onboard electric equipment).
    • If the plait is not damaged and in it there is no short circuit, check up conducting between the module of management РСМ and an injector (ами) on presence of breakage, short circuit or infringement of quality of contact.

Removal

 PERFORMANCE ORDER

  1. Disconnect a negative wire from the battery.
  2. Dump pressure in the power supply system (Section Procedure of dump of pressure of fuel).
  3. Disunite electric sockets of injectors of fuel.
  4. Disconnect vacuum and fuel hoses from a pressure regulator (Section Check of serviceability and replacement of a regulator of pressure of fuel).
  5. Disconnect from a fuel highway all tyres of grounding.
  6. Disconnect from a fuel highway a line of giving of fuel.
  1. For a detachment of a line of giving of fuel from a fuel highway at first release a safety clip штуцерного connections.

... Then enter in connection special, made of plastic, the tool and отстыкуйте a line, having wrung out the tool lock sponges.

  1. Give fixing nuts and disconnect a fuel highway from injectors.
  1. Remove the arm of a fuel highway located close with a regulator of pressure of fuel (the engine in volume 5.2 is shown).
  1. Give bolts (arrows) of fastening of a highway to the inlet pipeline.
  1. Take a fuel highway from an impellent compartment.
Bolts of fastening of a fuel highway on the engine in volume of 4.0 l.
  1. Take injectors from the nests in the inlet pipeline, remove from each of injectors and throw out sealing rings of three types.

At correction of defects even one of injectors it will be reasonable to remove all of them and to replace all three types of rings on everyone.


  1. Take from assemblage of a fuel highway clamps of injectors.
  1. Cautiously remove from an injector sealing rings of round section.

Installation

 PERFORMANCE ORDER

  1. Grease new rings (подушечного type) with pure impellent oil and insert them into injectors.
  2. Grease sealing rings of round section with pure impellent oil and put on them an injector (), then insert each of injectors into the nest in a fuel highway and establish clamps.
  3. Grease new sealing rings-linings with pure impellent oil and enclose from in nests of injectors in the inlet pipeline.
  4. Establish assemblage of injectors with a highway on the inlet pipeline. Tighten bolts of fastening of a highway with demanded effort.
  5. The further installation make in an order, the return to a removal order.
  6. On termination of installation of injectors / a fuel highway turn the ignition key in position ON, however do not turn a starter (it will lead to two-second inclusion of the fuel pump and pressure lifting in fuel lines and a highway). Repeat inclusion two-three times, then check up fuel lines, a highway and injectors on presence of signs of leaks.