Thread: perplexed

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I just read back through your initial post, and it sounds to me like you may have fixed your problem of running for a short period of time and dying, but that your crank fuel (the injector pulse during crank) may be messed up. I have no idea how FIS does their programming, but for mine I have a base Injection Map, a base Spark Map, and then a handful of "correction curves" that apply modifiers to the two base maps for different things. One that I have continued to play with over time is Crank Fuel vs Coolant, which is basically the equivalent of the choke function on a carburated engine, but only active during crank, and on my engine small changes to that curve have drastic effects. There is also Injection vs Coolant, which only comes into play after the engine is started (above 600 rpm), and again is the choke function; along with idle speed vs coolant, which is your higher idle speed curve. Another that had to be tweaked is the Accel vs Coolant, and the Accel vs RPM which is the accelerator pump function.

Who do you have dialing in your ECU programming for you, or are you doing it yourself? Does Fuel Injection Specialties use laptop programming, or via some type of hand held?