The fuel injector on a Ford Focus is a device responsible for direct spraying of fuel inside the combustion chamber. On the one hand, injectors have made life much easier for motorists. On the other hand, even these reliable devices periodically fail. Fortunately, the driver can replace them with his own hands. The main thing is to know how it's done.
In today's article we will talk to you about the reasons for failure, malfunctions, flushing, removal and installation of fuel injectors on Ford Focus .
Ford Focus fuel injectors - operating principle
Ford Focus fuel rail
Gasoline is pumped into the fuel rail using a gasoline pump, to which the injectors are connected.
Based on a signal from the electronic control unit (ECU), an electric current is supplied to the injector coils, their cores are drawn inward, opening the fuel channels. Gasoline is sprayed into the combustion chambers and ignites under the influence of enormous pressure created by the upward pistons.
Removing and cleaning VAZ 2114 injectors
- 223 15 164k
- 151 2 127k
Injector performance calculator
Online injector performance calculator
Every car owner of an injection car sooner or later encounters problems in the fuel system and begins to think about cleaning the fuel injectors.
The task of the injector is to maintain the pressure created by the fuel pump and only at the right moment to open for a fraction of a second to allow the required amount of fuel to pass through.
There are a lot of different additives in the fuel, which during engine operation stick to the seat of the injector locking needle. As a result, the injector begins to spray fuel incorrectly or leak fuel when it should be closed. In such cases, it is necessary to clean the injectors or replace them.
The recommended period for cleaning injectors is 25,000 km - 30,000 km . Failure to properly maintain fuel injectors can lead to their complete failure, and then only replacement will be necessary.
There are several signs that indicate you need to at least remove and check the condition of the fuel injectors. Next, a decision is made to clean or replace the elements.
Pay attention to the behavior of your car and specifically the engine. They will tell you if there is something wrong with the injectors. This may manifest itself as follows:
- The engine produces less power, the same acceleration efficiency is not felt;
- If the engine performs poorly or lacks power, fuel consumption still increases;
- Poor starting is not a rare sign of injector failure;
- If the engine does not hold idle speed well, the injectors may well be the cause;
- The amount of toxic components in exhaust gases increases;
- At idle the speed increases.
Without removing the injectors, you can indirectly check them for leaks (or leaks). The video shows an example: you need to unscrew and lift the fuel rail, apply pressure and see if a leak appears. The check is the simplest and only for an obvious malfunction, however, if you suspect the injectors, it won’t hurt to do this.
What injectors are installed on Ford Focus
The Ford Focus is equipped with injectors manufactured by SIEMENS DEKA. These devices are highly reliable. Their service life can reach 160 thousand kilometers. However, car service specialists strongly recommend changing injectors every 120 thousand km.
Original Ford Focus fuel injectors
The process of removing the fuel rail (+photo)
General view of the fuel rail
Before proceeding directly to the dismantling process, you need to understand that you will have to remove the injectors, and therefore you can simultaneously diagnose and clean this unit. So, let's consider the sequence of actions that are aimed at removing the fuel rail:
- Remove the minus terminal from the battery.
- We are dismantling the receiver.
Unscrew the clamp and remove the crankcase ventilation hose
Unscrew the oil circulation pipes
Removed the oil dipstick
Having disconnected the connectors, we disconnect the ramp from the on-board network
After unscrewing the fastening screws, we dismantle the fuel pipe bracket
Unscrew the screws by 5 and remove the ramp
Unscrew the fastenings of the fuel supply regulator and remove it
Reasons for withdrawal
There are several reasons for removing the fuel rail from the car:
- Cleaning injectors.
- Replacement or repair of the ramp itself.
- Removing the valve cover.
- Carrying out diagnostic and repair operations that involve engine disassembly.
- Other operations where removal of the ramp is required.
Fuel rail mounting diagram
Checking Ford Focus injectors
As mentioned above, both the fuel system ECU and the injector itself can fail. To carry out a complete diagnosis of the ECU, special software is required, which the average motorist simply does not have. Therefore, the only option is to diagnose the machine at a service center. The program, connected to special equipment, will quickly detect ECU errors and correct them.
Photo: washing fuel injectors on a special stand
And if problems arise in the mechanical part of the injector, then the diagnostic program will be useless. The maximum that it can do is indicate which cylinder is not working correctly. After this, the car owner can only replace the failed injector on the specified cylinder, since these devices cannot be repaired.
how to remove injectors without a puller - Ford Transit Forum
Repair of Ford Ranger diesel injectors on Ford Ranger cars. Often, a test bench is required for a full diagnosis.
If you need a real clue on where to check these injection system components on a ford ranger, contact your project help desk. If you do not want to face difficult and, therefore, costly repairs in the near future, then contact our technical centers.
Removing Ford Ranger injectors
Here you can diagnose the injectors and promptly determine their malfunction. Moreover, many motorists are ready to tell you how to do this on the forums.
Neglecting qualified service in this case even threatens to repair the diesel engine. Computer diagnostics of diesel injectors Part of the complex work is computer diagnostics of Ford Ranger diesel injectors. During the event, a scanner is needed, through which the technician can diagnose problems.
Regardless of what type of diagnostics is required to fully identify the problem - a computer assessment or a bench test - our structures will perform it inexpensively and. Repairing Ford Ranger diesel injectors on a stand An almost standard measure is repairing Ford Ranger diesel injectors on a stand.
I found time in the evening, opened the hood and decided to remove the spark plugs. It’s not clear what to remove first, except for the plastic decorative cover above the engine. I found out how to remove a Ford Ranger injector without any problems. And he started posting in chats asking how to remove the candles. Apparently at this time Romka freaked out and, despite the late hour, came to my house.
Replacing injectors on a Ford Focus car
Before we move on to describing the process of removing the injectors, you need to select everything you need for the job. Here is a list of tools and consumables:
- Phillips screwdriver;
- set of hex keys;
- set of open-end wrenches;
- pliers;
- wrench and set of socket heads;
- flat screwdriver.
Step-by-step instructions for removing and replacing Ford Focus fuel injectors
We remove the fuel rail to check the operation of the injectors and replace them, as well as when dismantling the intake pipe.
In order to remove, check and replace fuel injectors on a Ford Focus, you must perform the following steps:
- Relieving pressure in the power system
- Using a screwdriver, move and remove the rubber tip of the crankcase ventilation tube from the cylinder head cover pipe.
- Use a screwdriver to pry up the plastic retainer on the tip of the fuel supply tube and move it outward.
- Use a screwdriver to press the spring clamp and remove the tip of the fuel supply tube from the fuel rail pipe.
- Using a screwdriver, press the lock of the outer injector block and, lifting it slightly, remove the block of blocks from the connector of this injector.
- Sequentially remove the block of blocks with the wiring harness from the remaining injectors.
- Using a 10mm head, unscrew the two self-tapping screws securing the fuel rail brackets to the intake manifold.
- We pull the fuel rail along the axes of the injectors and, overcoming the resistance of the injector sealing rings, remove the injectors from the holes in the cylinder head. Remove the fuel rail with injectors.
- To remove the injector, use a slotted screwdriver to pry up the retainer and remove the injector.
- Slide the clamp along the grooves of the nozzle and remove it.
- Using a thin slotted screwdriver, remove the O-rings from all other injectors.
- Using a screwdriver, remove the spring clamp and remove the fuel pressure pulsation damper from the hole in the fuel rail.
- Remove the sealing ring from it.
- Install the injectors into the fuel rail and the rail onto the intake pipe. Connect the pipeline to the ramp, start the engine and check the tightness of the connection of the pipeline and the injector seals.
We replace the sealing rings of the injectors and the fuel pressure pulsation damper in the rail with new ones. Before installing the injectors and fuel pulsation damper into the rail and cylinder head, apply a thin layer of engine oil to the sealing rings. It is not allowed to wash the injectors by immersing them in a detergent composition to avoid damaging their electrical parts.
Injector diagnostics
If any malfunctions or problems occur, you should immediately carry out diagnostics of the injector, which will reveal system malfunctions.
A comprehensive check can be carried out using the on-board computer. In addition, the serviceability of the valves, cylinder head gasket, pressure regulator and fuel pump Ford Focus 2 is checked. Problems can also be caused by low battery voltage, lack of spark and malfunctions of the polarity control system.
Indirect evidence of injector malfunctions on a Ford Focus is:
- weak vehicle traction;
- the smell of unburnt fuel in the exhaust gases;
- difficulty starting the engine;
- unstable operation at idle and in transient modes;
- poor acceleration dynamics;
- sharply pressing the gas pedal causes failures;
- loss of power;
- increased fuel consumption;
- popping noises in the exhaust system;
- detonation when accelerating;
- ignition is missed;
- increased exhaust toxicity;
- Spark plugs, catalytic converter and oxygen sensor quickly become unusable.
The contamination of injectors is especially pronounced at low air temperatures, as fuel volatility decreases. During this period, malfunctions in the injection system are clearly manifested by problems with starting a cold engine. Obvious symptoms of a system malfunction are mud deposits, which can only be identified upon opening.
Cleaning Ford Focus injectors
There are two options for washing injectors: with and without removing them from the car. The removed injectors are washed on special stands using ultrasound, under the influence of which even the oldest contaminants disappear. Ordinary drivers do not have such stands, so below we will consider the more popular option of washing injectors without removing them. Here's what you'll need for this:
- liter of special flushing fluid;
- two automobile nipples;
- automobile fuel filter;
- a pair of metal clamps;
- a meter piece of rubber hose with a diameter of 12 mm;
- drill with 13 mm drill bit;
- electric pump;
- two liter plastic bottle.
Flushing sequence
Procedure for flushing fuel injectors on a Ford Focus
- The bottom and cap are drilled into the plastic bottle. This is done with a “13” drill. Automotive nipples are inserted into the holes.
- The spool is unscrewed from the nipple inserted into the plug. This must be done so that the flushing liquid passes freely into the nozzles.
- Now a rubber hose is put on the nipple inserted into the plug and secured with a metal clamp. The second end of the hose is put on the fuel filter and secured with a second clamp. A piece of rope is screwed to the bottle with tape (so that the bottle can be hung on the hood).
- The car starts. You must wait until the engine warms up to 90 degrees. After warming up the car turns off. The fuel hoses are removed from the fuel pump, the car starts again and runs until it stalls. All this is done in order to completely relieve pressure in the fuel line.
- Now you need to find the fuel hose with a green button on the clamp, connected to the fuel line. To remove it, just press the green button and pull it towards you.
- The hose is put on the fuel filter (the clamp with the green button should make a characteristic click).
- The washing liquid is poured into a plastic bottle.
- An electric pump hose is connected to a nipple inserted into the bottom of the bottle, after which the bottle is suspended on the open hood of the car.
- Using a pump, a pressure of 3 atmospheres is created in the bottle (as the liquid flows out of the bottle, the pump will have to be turned on several more times to maintain this pressure).
- After the required pressure has been created in the bottle, the car starts at idle and runs for 15 minutes.
- After this time, the engine is turned off and cools down for 10 minutes.
- If there is still liquid left in the bottle, the engine starts again and runs until it stalls.
- After this, the flushing system is removed from the car, and the fuel hose is installed in its original place. Injector flushing is complete.
What to pay attention to
There are a few things to keep in mind when cleaning your injectors. Here they are:
- You cannot save on flushing fluid. The injector is a very important part of the engine. And it is extremely sensitive to the quality of the flushing fluid. The optimal choice for washing Priora injectors is a product from Wynns, developed specifically for injection engines. The cost of a liter bottle is 700 rubles;
Flushing fluid from Wynns is the best option for Priora injectors
- You need to be very careful when removing an empty plastic bottle from the hood. It should be remembered: the pressure in it is enormous, so it can explode literally from one careless poke with a finger, and flying nipples can seriously injure the driver.
The plastic bottle must be removed carefully after washing the injectors.
Replacing injectors is a long procedure. Nevertheless, it is quite within the power of a novice driver if he has at least a vague understanding of the structure of an injection engine. When cleaning the injectors, the situation is much simpler: you just need to be able to use a drill and know where the main fuel hose is located.
Symptoms for replacement
In fact, there are quite a lot of reasons why injectors may not work well. And below are the most common symptoms:
- Difficulty starting the engine in any weather;
- The engine is running erratically;
- The engine stalls at idle;
- High crankshaft rotation speed at idle speed;
- Loss of power, poor response to the accelerator pedal;
- When you press the gas, shocks or dips may appear;
- High gas consumption;
If the nozzle is dirty or damaged, it should be replaced or cleaned. There is no point in repairing it. It should also be noted that today injectors cannot last even 100 thousand km .
We clean the injectors with our own hands using carburetor cleaning fluid
Checking old injectors
Before replacing injectors, it is recommended to check them. This will allow you to determine whether it is working or not.
