MSefi.com read only forum (Jan.15,2018)

my car did the same thing as what you described until I adjusted the injector opening time in fuel settings, injector cheracteristics. Maybe this could be it, did you try that? second thought does your o2 sensor have athourity to make large fuel adjustments, could it be overactive? Try turning off ...

I would have to agree with cygnus, and tune your engine to use the lowest possible fuel pulse duration, to save money, but this will prolly have a negative affect on emissions (to much nox?) but who cares, unless you have air care regulations like me

Ok I had to re install tuner studio and now this adjustment works! weird

Thanks for the reply, I thought that would be it and have tried adjusting that a bunch of times, maybe the problem is with tuner studio, it doesn't make a diff! I'll have to get mega tune working.

Hi guys I got a MSII with a stepper iac and all seems to be working fine but i cant seem to figure out how to get it to go from its cranking position, to its temp based run position faster after the engine fires. its ok when the engine is cold but when warm stays at over 2000 rpm for like 6sec ...