WDP Injector Cleaning & Flow Testing

At Websters we take our dyno tuning seriously. Often vehicles respond much better after having the injectors cleaned, as fuelling is a major part of the tuning process. As such, WDP has invested heavily in a state of the art injector cleaning program.

We clean and service all types of fuel injectors, both mechanical and electronic, petrol and diesel. Fuel injection is a sophisticated system that controls the delivery of the fuel. Fuel injection systems help to:

  • Increase the car’s performance
  • Reduce the car’s fuel consumption
  • Lower the levels of pollution

Over time chemicals, lacquers and varnish in various fuels contaminate the fuel injectors.  This build-up of contamination can occur inside the body of the injector, on the pintle valve, the pintle head and seat, and also in the injector’s filter basket fitted to the neck of the injector.

The purpose of cleaning and flow-testing is to:

  1. Remove any contaminants inside or outside the injector that impede fuel flow or degrade fuel spray pattern
  2. Accurately measure each injector’s fuel flow ability
  3. Acquire quantitative data on injector performance the vehicle owner can use in matching injectors or tuning the engine’s fuel system.

Any set of fuel injectors will benefit from Websters clean and flow service. This is even true of new injectors because the individual-injector and system-total fuel flows must be known for performance tuning purposes. It is not uncommon for a set of original equipment (OE) injectors to have an unacceptably wide range of fuel flow and it’s possible to even have new injectors that do not function properly. WDP’s standard testing process identifies those problematic injectors. 

Symptoms of Fuel Injector Issues

  • Vehicle has lost some of its performance/power
  • Vehicle is using excessive fuel
  • Vehicle is difficult to start hot or cold
  • Vehicle is not idling smoothly
  • Excessive exhaust emissions

What can I do about these fuel injector problems?

Some dealers will suggest that the fuel injectors may need replacing, which is a very expensive method of solving the issue.  Injectors can cost anywhere from $80 – $250+ each.

Be aware that the minimum life expectancy of many injectors is 1 billion pulses – well within the life expectancy of the car. Fuel injectors can be cleaned both inside the fuel passage and outside around the seat and pintle head by WDP, saving you money, time and getting your vehicle operating the way it should.

Chemical contamination and dirt in the fuel system can cause build up inside the fine screen of the filter basket and restrict the fuel flow rate. before-cleaning

It has been shown that a varnish layer as fine as 5 microns on the pintle head and seat can restrict the fuel flow through the injector by as much as 25{1f215e3cdffb842c3ffe2db1de710e78cd98532996548df15eda2c31d85841b8}.








How do we service your injectors?

  1. INITIAL FLOW TEST: Your injectors are installed on computer-controlled injector flow-testing equipment. A unique, non-flammable, petrol-like test fluid is pumped at a precisely-controlled pressure through the injectors while they are pulsed by injector-drivers built into the equipment. The volume of ‘fuel’ passed through the injector is accurately measured for a set amount of time and from those figures, fuel flow is derived. During the flow-test, the injector spray patterns are visually inspected and analysed by WDP technicians.
  2. CLEANING: After the initial flow-test your injectors are transferred to an ultrasonic cleaning machine and connected to injector drivers. They are submerged in cleaning solution and pulsed while being subjected to ultrasonic waves. The combination of the solution and the ultrasound aggressively clean the internal and external parts of the injectors.
  3. FINAL FLOW TEST: The now-clean injectors are reinstalled on the flow-tester and run again. At the conclusion of the test, a printed report is produced. This report lists: fuel flow rates (in pounds-per-hour and cubic centimetres per minute) before and after cleaning, and spray pattern assessments for each injector tested. Also included is the “system balance” number which is the flow difference, expressed in a percentage, between the injectors having the highest and lowest flow rates amongst the lot of injectors tested.