Jeep Grand Cherokee

1993-1999 of release

Repair and operation of the car



Jeep Grand Cherokee
+ Cars of the Jeep Grand Cherokee brand
+ Settings and routine maintenance
+ Line six-cylinder engine
+ V8 engine
+ Procedures of the general and capital repairs of the engine
+ Cooling systems, heating and air conditioning
- Power supply system and production of the fulfilled gases
   General information
   Procedure of dumping of pressure of fuel
   Check of pressure of fuel and functioning of the fuel pump
   Removal and installation of the fuel tank
   Cleaning and repair of the 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 fuel level sensor
   Removal and installation of assembly of the 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 the regulator of pressure of fuel
   Serviceability check, removal and installation of injectors of fuel
   Check of functioning and replacement of components of system of stabilization of turns of idling (IAC)
   Service of system of production of the fulfilled gases - the general information
+ System of electric equipment of the engine
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ Manual box of gear shifting
+ Automatic transmission
+ Transfer case
+ Coupling and transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ System of onboard electric equipment
+ Governing bodies and methods of operation



Repair and replacement of fuel lines

See the prevention at the beginning of the Section Procedure of Dumping of Pressure of Fuel.

Always before works dump pressure in a power supply system (Section Procedure of Dumping of Pressure of Fuel).

Lines of giving and return of fuel and vaporizing lines pass between the fuel tank and a motive compartment of the car. Lines fasten to the car bottom by means of clips and screw assemblies and from time to time have to be checked for existence of traces of leaks, excesses and deformations.

If it is available strong indications of pollution of a power supply system or the fuel filter, lines have to be disconnected and blown. Check the mesh filter of the block of the sensor of the measuring instrument of fuel for existence of signs of aging of material and damages.

Steel tubes

If there is a need for replacement of fuel lines or lines of systems of decrease in toxicity of the fulfilled gases, use only replaceable sections with marking of Chrysler (or equivalent to them on a design and material).

Do not try to change steel tubes copper or aluminum at all. These materials do not provide sufficient durability for keeping of the vibration loadings arising in the course of normal operation of the car.

As the fuel lines used constantly are in systems of injection of fuel under pressure, their design has to meet the special, connected with this factor conditions.

Some of lines are equipped carving type with the nipple connections equipped with sealing rings. Every time weakening of nipple connections during repair and service and repair of components observe the following requirements:

  • For easing and delay in nipple connections use a set from two wrenches.
  • Check all sealing rings for existence of cuts, cracks and signs of aging of material. In case of detection of defects change rings.
  • If there is a need for replacement of fuel lines, try to use only company replaceable components or components which design meets the requirements of the standard of company.

Flexible hoses

As replaceable components use only company hoses or equivalent to them on a design and type of material. Non-compliance with this requirement is fraught with an exit of hoses out of operation as a result of influence of elevated pressure in system.

Do not lay flexible hoses at distance closer than 100 mm from components of system of production of the fulfilled gases and 250 mm from the catalytic converter are closer. Metal lines and flexible hoses should not adjoin to car frame elements. The minimum gap providing implementation of this requirement makes 6,5 mm.

Removal and installation

 PERFORMANCE ORDER

  1. Dump pressure in a power supply system.
  2. Remove all fixture fixing lines on a car body.
  3. There are various methods of undocking of nipple connections of fuel lines (depending on their design). Having carried out this undocking, carefully remove lines from chassis elements.

Service of the nipple connections of bystry joining equipped with a plastic ring is not made in an individual order. Do not try to make repair of the line in case of failure of this kind of connection - replace it assembled.


  1. For undocking of the nipple connections equipped with a plastic ring press a tube in connection and squeeze a ring of the plastic holder.
  1. For undocking of nipple connections of reed type press lock uvulas to the line and pull for the last.
  1. You make installation upside-down. Do not forget to replace sealing rings in connections of carving type (if those are used).

Repair

In case of damage of the fuel line (metal or flexible) it is necessary to replace defective section with a company replaceable element. Installation of replaceable components of other type it is fraught with their exit out of operation as a result of influence of elevated pressure in system.