#4714, "RE: need advice with upgrading my 420a injectors" In response to In response to 2
It sounds to me like you still have fuel cut. Your FCD probably isn't tuned correctly.
Though those fuel injector calculators are handy, they probably aren't accurate for your purposes. Most of them don't take into account rising rate fuel pressures. The injector sizes you're coming up with assume you have a static fuel pressure and some sort of electronic means for increasing the injector pulsewidth.
