So we just put a 1.6 in and used 1.6 injectors etc. Runs good driving around town. But if you are part throttle and Rev it over 4k it starts to surge like running out of fuel. However, at wot runs fine. A few things to note are it has a mild 3tech cam. It is turbocharged, but symptoms happen out boost and in boost depending on throttle angle. I tried a 2 bar map and 260 injectors to see if it was fuel and or boost related. But still does same thing. I'm wondering if it's an o2 sensor or something. I'll post a video.
In the video right before I do wot in 2nd it does the surge thing in 1st.
[youtube]G16t suzuki swift test run 3: http://youtu.be/unmlL5t3Uc4