Setting up a single injection: step by step instructions, expert advice

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

The entire car range can be divided into carburetor and injection systems. The manufacturers did not stop there, offering another option - single injection. Why is it necessary to set up a single injection and how to avoid installation errors?

About the concept

The correct setting of the mono-injection is important for high-quality fuel supply to the internal combustion engine. A feature of the useful development is the supply of fuel to the combustion chamber common to the cylinders. This system was invented as an alternative to carburetors. At first, the single-injector design was invented, then they switched to the manufacture of distribution injections designed for each cylinder.

The design includes a nozzle. She works under pressure. It includes an ambient temperature meter, a fuel pressure regulator, and a return line. The task of the regulator is to stabilize the pressure, eliminating the appearance of air pockets after the engine is turned off.

Principles of single injection

Car ownersoften interested in setting up a single injection, so you should study its operation scheme.

• With impulse movements, the nozzle, which is an electromagnetic valve, gives fuel into the chamber. That, in turn, is controlled by the control unit.
• The fuel-air structure moves into the first opening cylinder. Air volume, pressure parameters are regulated by sensors.
• Excess fuel travels the opposite direction along the built-in highway.

Before setting up a single injection from scratch, it is necessary to inspect the integrity of the meters, at the same time it does not hurt to check the tester - an important element in the work. Not everyone understands how this device differs from injectors.

Distinguishing Features

The basic distinguishing feature of this product from injection mechanisms is the presence of one nozzle for the total number of cylinders. For injectors, they are distributed to all cylinders separately, which allows for more economical fuel consumption.

Compared to carburetors, this brainchild of engineering manages to start the engine faster, and this is possible due to the presence of a special valve. Mono-injections, pumping structures are not threatened by such "childhood diseases" as clogging or sticking of the needle. What else is useful in the system?

About meritorious traits

Before you learn how to set up a mono-injection "1, 8-Passat-RP" or another foreign car, it is useful to learn about the appropriateness of these manipulations. Benefits include:

1. Engine starts faster than carbureted types.
2. Due to the increase in engine efficiency, fuel consumption will not upset.
3. You don't need to adjust the fuel supply, nor do you need to manually create a fuel-air mixture.
4. New automotive product functions more environmentally friendly by releasing less carbon dioxide into the atmosphere.
5. The design is easy to install and easy to operate.

This system made it possible for people to purchase comfortable cars without going into details of the technical arrangement of the unit. Due to the introduction of mono-injection, drivers have experienced real savings on gasoline and on engine repairs. Are there any drawbacks to this "know-how"?

Not without flaws

Some experts consider the design already outdated, not justified due to the high cost of parts. You have to spend a lot of time searching for some of them, and sometimes it’s completely unrealistic to find them. To carry out diagnostic, repair procedures, it becomes necessary for the service center to purchase specialized equipment that costs a lot. Products are demanding on the quality of the fuel resource. Nevertheless, the system continues to live, and the owners of foreign cars have a question about installation.

Volkswagen mounting nuances

Auto was loved for its reliability, imposing appearance, prestigious technical characteristics. Initially, in the Passat mono-injection setting,measurements of the following nature: the resistance should be 1800 ohms, the temperature should be 20 degrees.

The next step is to correct the gap under the XX. A measuring device - a voltmeter - will help to recognize if there is a short circuit in the circuit. By changing the position of the screw under the mono-injection, the clearance is adjusted.

Then, in the Passat B3 mono-injection setting, the throttle valve is connected. When the injector connectors are connected, mono injection is installed, fuel supply, it is necessary to turn off the battery by turning on the engine to reset the settings of the model we are interested in. The battery is reconnected, the voltage is checked between the 1st and 5th pins of the connector responsible for controlling the throttle. Between the 1st and 2nd contacts, the value should be 0.186V. In a different situation with indicators, you need to configure the system correctly. How is it with other brands?

Requirements for setting up a mono injection on an Audi

You can get to the node by removing the air filter. It is necessary to inspect whether the gap of the limit switch of the idle speed regulator is set correctly. How to act without mistakes?

• Auto ignition is turned off. The block is removed from the IAC plug. The two pins at the top are supplied with 6V. The control rod should then move in.
• For proper tuning of the "Audi 80" mono-injection, the position of the shock absorber should be adjusted.
• A tester is connected to the two PXX contact outputs at the bottom. It is more convenient to use a device that can make sounds:a short circuit is easier to detect.
• Now it's up to the probes in 0.45 and 0.5 mm. They will act as assistants in measuring the distance between the throttle screw and the PXX stem. A short circuit should occur when a half-millimeter probe is inserted. This should not happen when using a second probe.
• The control measurement in the Audi single injection setting is important for the normal functioning of the unit. The IAC connector will not need to be used in this case. The ignition is turned on, and the potentiometer helps to measure the reference voltage. A malfunction can be judged by readings other than 5V. With a slight difference, for example, 0.2 V, we can talk about problems in the mains. It is better to contact the masters for qualified diagnostics in order to find out the causes of defects for sure or to set up the operating mode of the structure.

Common problems

In the lexicon of motorists, mono-injection is lovingly called "monique", and its problems are by no means encouraging. What are service people facing?

• There is a "walk" of revolutions. This indicates defects in temperature sensors.
• "Swallow" loses power - it means air has entered the node.
• Due to sticking of the “limit switch” on the idle speed controller, the engine is in constant idle mode.
• Engine refuses to start.
• Releasing the gas pedal, the motorist sees that the speed has dropped.

What do the experts recommend?

A word of expert opinion

Why are my settings being reset? Difficulties,an urgent need to “reboot” the unit arises among fans of driving short distances. This problem is inherent in transport owners who prefer to regularly start the engine while simultaneously pressing the gas pedal. What to do?

• Engine starts, warms up. The cooling fan should run twice. The optimum oil temperature is +80 degrees.
• We turn off the power unit, turning off the ignition.
• The connector from the control unit must be disconnected to clear the RAM.
• The above connector turns on again.

The advice is suitable for any modification of the mono injection.