What affects idle speed on Ficht engines?

[baddog1016]

Specifically a 2000 225. My engine idles too low (380-400 RPM) and I was under the impression this is controlled by the EMM. I was told today that is not the case that there has to be a different problem. I do know I have good compression in all 6 cylinders and spark in all 6 cylinders. The spark plugs look the same when I pull them out and actually are nice and tan on the ceramic that is shielded by the base. The spark plugs tend to be sooty at the electrode but I think that's because I have to motor at pretty much idle speed for 15 minutes to wear I pull the boat from the water. Is there a way to test the injectors while installed in the engine? I have to send my EMM out for repair because of a no crank condition and would love to know my injectors are good while the EMM is gone. If I have to wait I will do the cylinder drop test. I checked two cylinders before the no crank condition hit and the engine stalled both times.

 

[faztbullet]

The EMM controls idle speed but it gets its information from the sensors. The exhaust pressure sensor,water temp sensor and air temp sensor, these all tell EMM to adjust fuel/air ratio

 

[baddog1016]

faztbullet, thanks! I was doing a cylinder drop test when two things happened:
Code 26 was set and and I had a no crank issue that I am sure is the EMM. I am including screen shots of the data to see if you might glean anything from these. (I replaced the EP nipple)

 

[faztbullet]

Did you clean the EP??? 26 is low voltage..so swap starting battery

 

[baddog1016]

I replaced the EP, and battery voltage was at 12.4 volts. I just noticed 40V circuit was at 31 volts. I was talking to someone yesterday who told me that will affect idle speed as it affects injector firing. I have the EMM out of the boat and will sending it out today for repair.