Essex Rotary are an authorised ASNU fuel injector Service Centre Using our industry leading ASNU Classic GDI fuel injector flow bench we are able to diagnose fuel injector issues and repair them in possible.
Faulty or poor performing injectors can cause a number of issues including but not limited to.
- Poor fuel economy
- Poor running
- high exhaust emissions
- Catalytic converter damage
- MOT failure
- engine damage, including engine bore wash
- Loss of power
- Poor starting or failure to start
- Strong fuel smells from the exhaust
We recommend servicing your injectors on a semi regular basis in order to maintain your engines performance, especially on older vehicles running older design fuel injectors. how frequently will depend on how your using and servicing your car.
How does out service brake down?
Once we receive your injectors, or have removed them from your vehicle, we will clean and degrees them in preparation for testing and servicing.
Your injectors are then tested and inspected using our ASNU flow bench in the following ways, with data recorded for your reference.
- Leak test – Injectors are placed under pressure to ensure there are no leaks present
- Inductance test – Each injector is cycles 8000 times and the inductance of the internal coil windings are measured to ensure they are within tolerance
- Dynamic injector Test – Your injectors are run through a series of tests to simulate the varying range of rpm’s and pulse widths to ensure they behave in an expected manner, and are performing in a similar manner to the other injectors of the same spec,
- Dynamic flow rate – Your injectors are run through a fixed range of rpm’s and pulse widths and their dynamic fuel flow rate is measured to determine with dynamic flow rate. and ensure they are performing the same as the other injectors of the same size in your batch.
- Static flow rate – Your injectors are run at 100% duty cycle (wide open) for s short period and their flow rate measures, from this we calculate each injectors actual CCM (cubic centimetre per minute) rate.
- During all stages, spray patterns and atomisation ability is inspected and noted.
Injectors are then stripped and ultrasonically cleaned to remove debris and contamination from inside the fuel injector. This also has the effect of helping to restore your injectors to as new condition.
Your Injectors are then rebuild with new parts such as upper and lower O-Ring seals, micro filters, pintail caps and spacers if required*
Your rebuilt injectors are then tested on our ASNU flow bench once again with further data recorded to compare with the pre cleaning results. Tests are carried out as follows.
- Leak test – Injectors are placed under pressure to ensure there are no leaks present
- Inductance test – Each injector is cycles 8000 times and the inductance of the internal coil windings are measured to ensure they are within tolerance
- Dynamic injector Test – Your injectors are run through a series of tests to simulate the varying range of rpm’s and pulse widths to ensure they behave in an expected manner, and are performing in a similar manner to the other injectors of the same spec,
- Dynamic flow rate – Your injectors are run through a fixed range of rpm’s and pulse widths and their dynamic fuel flow rate is measured to determine with dynamic flow rate. and ensure they are performing the same as the other injectors of the same size in your batch.
- Static flow rate – Your injectors are run at 100% duty cycle (wide open) for s short period and their flow rate measures, from this we calculate each injectors actual CCM (cubic centimetre per minute) rate.
- During all stages, spray patterns and atomisation ability is inspected and noted.
If your injectors are still not performing then additional ultrasonic cleaning may be carried out.
Please note that testing and cleaning cannot restore all injectors back to peak performance however if the ASNU injector servicing machine cannot restore them, then your only other choice os to replace them.
*new parts are used if still available.
Please contact us for pricing on your specific needs as prices vary depending on your injector.
Tips for a smooth service.
Tips for removing your injectors and preparing for shipping to Essex Rotary for Servicing.
Once you have confirmed with us pricing for the injectors you require servicing, please follow these steps when removing and packing your injectors for shopping to Essex Rotary.
This advice should be followed in order to optimise the service we can provide you along with helping you understand what data we will be providing you.
Remove your injectors carefully
Please take case when removing your fuel injectors from your engine that you keep them clean and do not drop them. Also please make sure you do not drop any debris or dirt in to the top of your fuel injector where the filters are located.
While we will replace filters where possible any contamination that is introduced in to the injector filters after removal can have a negative impact on the accuracy of the data gathers on the first (before cleaning) test.
This will mean that if your trying to diagnose the cause of a running issue to be a specific injector then this could cause you to be given inaccurate results when we look at your before and after results.
Number your injectors when removing them
Please number each injector when you remove them, for example if your injectors are from an RX-7 13b REW engine then they would normally be referred to at Primary Front and Primary Rear, along with Secondary Front and Secondary Rear.
To simplify this process you could number them as follows:
Front Primary – Number 1
Rear Primary – Number 2
Front Secondary – Number 3
Rear Secondary – Number 4
If you have a V8 for example then simply number 1 bank from 1 – 4 then the other bank from 5-8.
For a 4 or 6 cylinder you could use the same principle of numbering each injector to coincide with each cylinder.
Ultimately it does not matter how they are numbered as long as its done clearly, this helps us keep them in order during testing and helps you know what injectors if any had issues.
Package each injector individually
It is important you package each injector individually, to prevent cross contamination from one injector to another, this can be as simple as putting each injector in a new clean resealable bad. these can be found easily in your supermarket etc.
Once they are all sealed individually then pack them well on a box along with your service request form.
Ship your injectors with the provided form.
To aid in the smooth processing of your injectors when they arrive with us at the servicing centre we would ask that you include an injector service request form with your package,
This will require you to provide some simple information regarding
- Your Vehicle Details
- Specific injectors part numbers
- Injector flow data if available
- Any issues you may have been having
- The reason for you wanting your injectors servicing
- Your return details and contact information.
