We are contacted on a regular basis with a request to flow match fuel injectors. Unfortunately we always have to explain that flow matching a specific set of fuel injectors is something we cannot do. Nor is it something any other fuel injector cleaning shop can do. The comeback from just about everyone is most always the same. “Well such and such at this or that place advertise that they flow match fuel injector”
How to Flow match fuel injectors.
In most cases injectors are purchased in bulk. Either new or from junk yards and various other facilities. The injectors are then grouped together by part number. They are tested for resistance and then put through an injector cleaning process. The cleaned injectors are now statically flow tested and those that flows the same amount are grouped together and sold as a flow matched fuel injector set.
Having a set of flow matched injectors just mean that they flow the same when they are fully open, it does not meant that the injector set is balanced.
What is static fuel injector flow testing?
Static fuel injector flow testing measures the amount of fuel that will flow through a fuel injector when that injector is fully open. It is done at a determined fuel pressure and over a specific period of time.
Static fuel injector flow testing will only indicate if a fuel injector set flow the same and not how healthy the injector or fuel injector set is. Dynamic flow testing is a much better test but unfortunately a more time consuming and thus more expensive way to test fuel injector health.