Direct Injection Fuel Injector Servicing - Cleaning - Flow testing
Restoring Performance & Economy
What is Direct Injection?
Modern day engines have evolved in many ways. Among all the changes to electronics, adaptive driving features and the power produced out of automobiles, direction injection has become increasingly more common on passenger vehicles. This fuel injection technology involves the tip of the injection being seated (usually with a carbon or teflon seal) directly into the combustion chamber of the engine. Whilst being an efficient way of delivering fuel, this particular injector style is subject to a wide variety of problems. The tips of the injectors are exposed to extremely high temperatures in the combustion chamber and will amass high levels of carbon deposits over time. These carbon deposits can build up directly over the spray nozzle of the injector affecting both the spray pattern and the volume of the fuel injectors. These injectors are designed to be used at extremely high fuel pressures and with those changes, very poor performance or misfires will easily occur if left untreated. We’ve also noted over time, factory seals, filters and spacers are deteriorating causing fuel leaks and foreign debris to enter directly into the injectors. Some common types of direct injection technologies are:
SIDI | GDI | FSI
Currently we do not service BMW Piezo Style Injectors – it may be something we’ll do in the future but is currently not in focus.
How we approach our Direct Injection cleaning and servicing
With the all the information outline above, we take our injector servicing very seriously. After many years of working in the petrol fuel injection industry we have carefully analyzed common issues that are frequently found in modern direct injection injectors. Although we aim for an efficient turn around time, we do not rush any of our injector jobs for the sake of getting quantity done over quality.
Please note: Due to the extreme operating conditions of these modern injectors, there is a chance that the injectors have sustained internal damage and are beyond repair. If this is the case with your injectors, the information will be explained to you and your injector will likely be charged out at a testing fee rather than a reconditioning fee so as to cover the labour involved in attempting to recondition it.
Our process involves:
- Getting as much information from the customer – vehicle make/model/year/fuel type used/reported problem
- Visually inspecting for:
damaged o-rings worn/hardened manifold seals/teflon seal, spacers and additional locking tabs
carbon deposit build up
fuel system contamination - Testing of coil ohm reading/resistance
- Before flow testing results (if applicable)
- Striping down the injector removing all serviceable parts including o-rings
buffers
Telfon/carbon seals
filter baskets
spacers
etc… - Externally cleaning and removing contaminates, dirt, rust, staining (where possible)
- Deep multi-stage ultra sonic cleaning (no rush, visually clean results must be observed before processed is finished)
- Refitting all renewed and matched seals, serviceable components and teflon seals
- Multi-stage flow testing at various RPM, pulse widths etc… inspection of spray patterns and consistency
- Final flow test and data results labeled accordingly to match each injector
Interested in our services? Click the contact button below for all our details
What can go wrong with Direct Injection?
Being a relatively new technology, direct injection opens up a whole new area for fuel injection issues. With a port injection engine, we have a fuel delivery to that motor that actively cleans the inlet valves. This feature of the modern direct fuel injection system is no longer able to be achieved except in the case of multi-point injection systems such as those found on Audi RS3’s.
The carbon that builds up on your valves, is likely the just as bad as the injector nozzles in the combustion chamber. This carbon build up with inhibit the performance and flow rates of the direct injectors. When your vehicle has been suggested to have the inlet valves and manifold ‘Walnut Blasted’, this is the perfect opportunity to have the injectors checked over to ensure they are operating within their tolerances.
Due to the high fuel pressure of the modern direct injection systems, the injector filter baskets (if left un-serviced) will eventually break up and cause irreversable damage internally on your injectors. This can become extremely expensive when you need to start replacing failed direct injectors. Costs can be upwards of $1000 for some models of vehicles.
Using E85 or alcohol based fuels can also cause many issues. The stripping of carbon deposits happens due to the nature of these fuels and can infact cause catastrophic damage if left unattended to. Many of these contaminates and debris can be shifted through your fuel system and end up inside your fuel rail, pressure sensor and eventually, the injector filter baskets.
Below are some examples of what can happen if your direct injectors aren’t considered in part of your maintenance schedule for your vehicle.
Why choose Injector Clean?
We take Fuel Injection seriously! Only using quality replacement parts and offering the best advice from qualified mechanics who specialize in Fuel Injection.
Know what’s going back into your engine is going to give you the best performance possible without having to second guess your Fuel Injection performance issues.