4a6fe675

4.19. Check of functioning and replacement of an injector of cold start and temperature switch

Fuel is extremely flammable therefore, working with any part of fuel system, take additional precautionary measures. You do not smoke and do not allow emergence near a working zone of naked flame or lamps without plafonds. Do not work in a garage with the equipment on natural gas with a match (such as heater of water or dryer for clothes). At hit of fuel on skin immediately wash away it water with soap. When performing any works with fuel system use goggles and you keep in readiness the fire extinguisher.

Injector of cold start

Check

At this check temperature of a cooler has to be below 30 °C. It is desirable that the engine was stopped a few hours ago. Disconnect the electric socket from an injector of cold start (it is shown by an arrow) and take him aside from a working zone - in a zone fuel vapors will appear.

 PERFORMANCE ORDER

  1. Unscrew two screws of fastening of an injector to a flange of the inlet pipeline and take an injector. The fuel line remains attached. Wipe an injector nozzle. Disconnect system of ignition, having disconnected a wire of the coil of ignition from the central contact of a cover of the distributor of ignition and having connected it a crossing point to the case of the block of cylinders. Turn on the fuel pump for 1 minute, having short-circuited the corresponding contacts of the relay (watch the Section Check of Pressure of Fuel / Fuel of the pump). Fuel should not come out an injector nozzle. If fuel comes out a nozzle, then the injector is faulty and it should be replaced. Switch off ignition and restore a former condition of the socket of the relay.
  1. Further direct an injector nozzle in bank or a bottle. Let the assistant will include ignition and a starter. The injector in bank has to begin to come out a stream of conical shape fuel. If dispersion happens well, then the injector works correctly. If a dispersion picture irregular, then the injector is damaged or faulty and it should be cleaned or replaced.
  1. If from an injector of cold start-up fuel does not arrive at all, at the included starter check tension on the electric socket of an injector of cold start. If tension is absent, check the temperature switch.

Temperature switch

 PERFORMANCE ORDER

  1. The temperature switch determines temperature of the engine and operates work of an injector of cold start. Usually the switch is located above ahead near the cooler temperature sensor. For this check temperature of a cooler has to be below 30 °C. It is desirable that the engine was stopped a few hours ago. Disconnect system of ignition, having disconnected a wire of the coil of ignition from the central contact of a cover of the distributor of ignition and having connected it a crossing point to the case of the block of cylinders. Shift a rubber cover from the temperature switch and check the voltmeter on contact of the socket with the black / yellow wire suitable it presence of tension.
  1. Let the assistant will include ignition and a starter. The voltmeter at inclusion of a starter has to show tension. Tension has to be present approximately within from 6 to 10 seconds, depending on engine temperature.
  1. If tension correct, disconnect the electric socket and an ohmmeter check presence of resistance between contacts of the temperature switch. It has to correspond to short circuit.
  1. Attach an ignition coil wire, start the engine and warm up it up to the temperature above 41 °C. On the heated-up engine between contacts there should not be a short circuit. If it takes place, then the switch is faulty and is subject to replacement.

Several types of temperature switches are established. On everyone the working temperature and the maximum time of inclusion are stamped.

Replacement

Injector of cold start

 PERFORMANCE ORDER

  1. Take off pressure in fuel system (watch the Section Removal of Pressure in system of injection of fuel).
  2. Disconnect the electric socket from an injector of cold start.
  3. If it is possible, a cap key or a long face head unscrew the union of the fuel line attached to an injector of cold start. On other models just weaken a collar of a hose and disconnect a hose from an injector.
  4. Turn off bolts of fastening of an injector of cold start and remove an injector.
  5. Installation back to removal. Clear the interfaced surfaces and apply new laying.

Temperature switch

Before this procedure wait for full cooling of the engine. Also for removal of residual pressure in the cooling system turn off a cover of a radiator or a broad tank.


 PERFORMANCE ORDER

  1. Prepare the new temperature switch for installation for what apply on a carving a thin film of sealant for carvings.
  2. Disconnect the electric socket from the former switch.
  3. Unscrew a long face head or a cap key the switch. After removal of the switch the cooler therefore install the new switch as soon as possible will begin to follow. Tighten the switch and attach the electric socket.