InjectorTest sheet explaination

The information in grey areas are the before cleaning data. The after cleaning data are in the white areas.
If you see a zero in the before cleaning data, it means the the injector was stuck shut. We consider an injector stuck if it doesn't start working during the first 60 seconds.

Fluid Temp - The temperature of the test fluid during testing. It is very important to keep the test fluid temperature stable to insure valid results. Few shops control their test fluid temperatues.

Test Pressure - Most tests are performed at 43.5 psi (3 bar), the standard for injectors. TBI and CIS are tested at a different pressure. Customers may specify a different value.

Resistance - The coil resistance at room temperature. Normally the readings should be within 10% of each other.

Leak Test - The injectors are checked for leaks at 10, 40, and 100 psi. This test is performed 3 times before cleaning and 3 times after cleaning.

Spray pattern - A visual check of how the injector atomizes the fluid while it's operated.

Static Flow - The injector is held open for and the volume is measured in cc's.

Pulsed Flow - The injector is pulsed on and off to simulate normal operation and is a very good indicator of how well the injector is working. This tests the internal spring condition as well as how clean they are.
The absolute value is not important, the thing to look for here, is how close they are to one another. The graph on the bottom of the test sheet is generated from this data.

CC/Min - This value is generated from the static flow data above and indicates the flow of the injector at the indicated test pressure.

Injector Balance - This is the percentage that the injector pulsed flows differ from each other. A low number is good and will normally be less than 5%. Both before and after servicing numbers are included.