EFII map fluctuations
The map source is on the aluminum adapter plate between the throttle body and the intake manifold.
I had that apart today and did not notice the .020 orifice. There is a reduction in the aluminum plate, but it was larger than the .042 safety wire I stuck in there to check for obstructions.
I was reading the SDS manual and they suggested a .025 to .035 restrictor to dampen the MAP fluctuations. I installed a .030 restrictor in the line today and it calmed things down quite a bit. If I should have a .020 orifice that might settle it down completely. I'll try that tomorrow.
I still don't understand why the fuel map requirements would change from day to day, but I'll keep working on it.
The next time I notice this I will try running on the secondary fuel injection and or switch the plugs on the two MAP sensors.
The other thing I wonder about is that I have the Dynon map sensor tee'd into this same line, could that be an issue?
Thanks for the help, terry.