Tekoro Fuel injection cleaner, also known as fuel injector cleaner, is one of those often missed steps in tuneups for cars, trucks, and other automobiles. Because it can get a little pricey to replace or disassemble and clean a fuel injection system, it's often glossed over during regular tuneups. Either that, or a shop will charge you WAY TOO MUCH MONEY just to put an additive fuel injector cleaner into a tank of gas for you. Clean fuel injectors help ensure: