Remove the fuel rail to access other parts and assemblies, as well as to replace the injectors

Preparing the car for the task

We reduce the pressure in the fuel supply system, as described in previous articles

How to remove the fuel rail and injectors on a Mazda 6

Disconnect the negative battery terminal

How to remove the fuel rail and injectors on a Mazda 6

Remove the decorative engine cover

Disconnect the wire blocks from the injectors

How to remove the fuel rail and injectors on a Mazda 6 How to remove the fuel rail and injectors on a Mazda 6

We move the clamps and disconnect the supply line from the fuel rail fitting

We unscrew the two bolts of the fuel rail

How to remove the fuel rail and injectors on a Mazda 6 How to remove the fuel rail and injectors on a Mazda 6

Remove the fuel rail by removing the injectors from the holes in the cylinder head

If the injectors remain in the cylinder head when removing the ramp, carefully remove them

Remove the injectors from the fuel rail

Install the fuel rail in reverse order, replacing the O-rings

Before installation, lubricate the O-rings of the injectors with engine oil

We start the engine and check the tightness of the pipeline connections and nozzle seals

Removing and checking fuel injectors

Signs of malfunctioning injectors:

- difficult engine start;

- unstable engine operation;

- stop the engine at idle;

- increased idle speed of the crankshaft;

- the engine does not develop full power, it is not throttled enough;

- jerks and dips in the engine when the car is moving;

- increased fuel consumption;

- glow ignition due to leakage of injectors

Remove the fuel rail as described above

How to remove the fuel rail and injectors on a Mazda 6 How to remove the fuel rail and injectors on a Mazda 6

Pry off the clamps and remove the injectors from the holes of the fuel rail

Check the resistance of the injector winding by connecting the probes of the autotester to the winding terminals

The resistance of a good injector should be 12-14 ohms at 20º C

If the resistance of the winding is not correct, replace the nozzle

O-rings must be replaced each time the injectors are removed

Before installing the injectors, lubricate the O-rings with engine oil

Install the nozzles and all parts in the reverse order