Fuel Injection Maintenance
Washing the Car
Before washing the car, put a scrub bag or trash bag over the airbox, breathers, and Power Commander. These are the only items that must be kept dry. Do not be afraid to spray the electronics or the throttle bodies. Do not, however, focus the high pressure of a pressure washer on these areas. After the car is washed, start the engine and let it run for a minute or two.
Air Filter, Breathers
These should be cleaned after every event. 
To clean, remove (be careful not to get any dirt into the intake ports) and lightly tap to remove any large pieces of dirt. Spray with K&N air filter cleaner item 77-507 and let sit for 5 minutes. Hose out with low pressure warm water from the inside out first, then spray the outside of the filter. The filter should be a white/gray color. Allow the filter to air dry. Do not use compressed air on fabric air filters as it will damage the element. It is a good idea to have two air filters if running two consecutive nights to allow the filter from the first night to dry properly. After the filter is dry, spray liberally with K&N Air Filter Oil Spray item 77-506 until the filter is an even pink/red color.
Fuel Filters
Fuel filters must be cleaned regularly to ensure unrestricted fuel flow. The 25 micron filter must be
cleaned every 2-4 weeks and the 120 micron every 4-6 weeks. If you clean the element with an air hose, blow it from the inside out, the particle swill be on the outside of the mesh. The best way (and really the only way to clean the 25 micron) to clean your filters is with an ultrasonic cleaner, this is the same thing jewelers use. We sell a low-cost ultrasonic cleaner and the cleaner fluid to go with it. You can also use this cleaner to clean your injector nozzles and your wife's jewelry. Fuel Filters should be cleaned every race for the first three races after the installation of new fuel lines or a new bladder.
Fuel Delivery System
Electronic fuel injection systems can function so perfectly that it is easy to forget how awful it was to take apart and clean those carburetors every week. Keep the fuel injection system functioning optimally with weekly maintenance and proper off-season storage. Because methanol evaporates quickly, do not leave it in the nozzles and fuel delivery system for extended periods of time. Make sure the system (fuel lines and fuel rail) are filled with methanol during the week. Oxygen is the enemy of a properly functioning fuel injection system. Do not allow oxygen (air) to get into the system. If the car will be raced on a weekly basis, the only necessary maintenance is to clean the fuel filters at least every six races. If the car has been recently painted, or is new, clean the fuel filters every week for three races. After cleaning the fuel filters, turn the pump on to circulate the methanol and remove air. Here is the best way to prepare the system if it is not going to be used for more than two to three weeks:
STORAGE-PURGE TANK METHOD
• fill the purge tank with gasoline
• hang the purge tank from the back of the roll cage
• turn on the pump and reduce the fuel pressure to half of what is used with methanol