[240racer]

to test if the injectors are spraying the correct amount of fuel, you need the rail, a 12v power source, and four graduated cylinders. Take the rail off the car and disconect the electrical connectors. THen get a longer piece of fuel line so you can pressurize the rail out of the car and place each injector in one graduated cyl while they are still atached to the rail. Then when you open each injector with a supplied voltage, fill up a graduated cyl and time how long it takes. then you can figure out how many cc/min the injector is actually spraying. I'm not sure how well this method works with our side feed injectors, because I haven't tried it, however it works just fine with top feed injectors.