I'm all for doing things yourself and finding a cheap solution but doing this wrong can leave one or two cylinders running lean or wash the walls of other cylinders with too much gas without the ECU ever knowing. It'll just read your O2 sensor and try to find a middle ground between the cylinders running rich and the ones running lean. Quick way to find yourself buying a new engine.
http://www.cruzinperformance.com/fuelinj.html
Cheaper than new injectors or a new engine and they'll flow test them and verify the spray patterns are good plus check for leaks. I sent a set to them and was happy with the results.
Bookmarks