Do Fuel Injectors Really Need Cleaning?
Do your vehicle’s fuel injectors really need to be cleaned? We understand there is misinformation out there surrounding fuel injector cleaning. You might think it’s a scam automotive service shops employ to get money out of you, but this simply isn’t true. Let’s talk about fuel injectors and how they can get clogged and end up needing to be cleaned.
Your car has a combustion chamber that needs both fuel and air to start and run the engine. The fuel injectors use a combination of nozzles, pumps, and valves to spray fuel into the combustion chamber cylinders. If the cylinders do not get the right amount of fuel, you will notice problems with the performance of your vehicle’s engine.
The most common problem injectors face is clogging, and the fuel combustion process is to blame. Even though your vehicle cannot start without combustion, it is this combustion that leaves carbon deposits on the fuel injector nozzles. Combustion also leaves carbon on the pistons. You can tell your fuel injectors are clogged or getting dirty if you notice
Any of these signs indicate a problem somewhere in your vehicle’s fuel system. If it isn’t the injectors, it could be the fuel pump or fuel filter. You may also have clogged fuel lines. Bear in mind that even if you buy premium fuel, it has sediment in it that can be drawn out of the tank by the fuel pump and circulate through your engine.
GDI Injectors overview
Most newer cars nowadays have GDI injectors, GDI injectors are a type of fuel injector used in gasoline direct injection (GDI) engines, which inject fuel directly into the combustion chamber instead of the intake manifold. GDI injectors are responsible for precisely delivering fuel to the engine, helping to improve engine efficiency and reduce emissions. Proper cleaning and testing of GDI injectors is important for maintaining engine performance and preventing issues such as carbon deposits, misfires, and reduced fuel economy.
On a GDI system, the fuel is injected directly into the combustion chamber at a much higher pressure than manifold systems, up to 200 bar.
These systems now require fuel pumps and injectors made of stainless steel and must be capable of performing at a much higher specification than ones seen on previous manifold injection systems. Both designed to deliver very precise quantities of fuel at extremely high pressures and in short increments, in some cases for fractions of a millisecond
To control these systems, the ECU is also of a higher specification and required to supply a higher current of up to 90v to 120v on some systems.
GDI Injectors Operating Modes
Two operating modes are available for the GDI system: Stratified and Homogeneous.
The Stratified Charge Running Mode is considered an economic combustion cycle, with an Air/Fuel ratio reaching as high as 65 to 1. It uses a minimal amount of fuel injected into the combustion chamber, just before the piston reaches the top and before ignition. This mode is designed for use at idle and light throttle settings when the car is being driven slowly.
The Homogeneous Running Mode is the typical combustion cycle, with an Air/Fuel ratio of 25 to 1. The injector supplies the combustion chamber with a standard amount of fuel, providing the engine with the necessary performance as the car accelerates. The Engine Management System determines when to switch between the Stratified Charge Mode and the Homogeneous Running Mode.
Fuel Injector Bench Test
We provide a comprehensive analysis of your injectors (MPI or GDI) that displays their performance before and after undergoing a bench test. This test simulates the various conditions that the injectors may encounter, ranging from a car idling to extreme engine load.
Furthermore, we perform a back flush and ultrasonic cleaning on your injectors to eliminate any internal debris and contaminants, and also replace all the rubber o-rings and internal filters.
The primary benefits of fuel injector cleaning are: