Steve:

First confirm your timing as per Lynn’s comments.

Did you start with every mode set to ZERO? 1 through 9?? Mixture knob in center???

Your fuel map is 128 bins wide x 256 bins high as in an X/Y graph, with ZERO settings on the vertical scale.

My map is displayed with Ed’s EFISM and is 0 to 256 on the vertical scale; I think Tracy’s EM displays it as -128 to +128.

After setting Mode 3 and Mode 2, all your settings should still read either 0 or 128.

At this point, your fuel flow is based on 23” MP and 0 or 128 fuel value.

I would expect as you open the throttle that more fuel will be required at 30” MP Vs 23” – has always been true with my engine.

Have you confirmed that you actually have a staging-point; i.e., where the injectors flip from just PRI to both PRI and SEC? – Very important to confirm where it is.

Confirm both Timing and Staging; repeat Modes 3 and 2 then use Mode 1 to tune fuel bin value at WOT.

Jeff

Hi Guys
Could I get some feedback on process and my thinking here.
I’m seeking to tune in our EC2 Renesis 4 port with Elec adjustable prop


Steps so far (can only run for 15mins before overheating)
OAT is presently 33-40C 91-104F
Prop set course

1. EC2 Injector and Coil diagnostics all good
2. With 2 squirts she starts well after approx 2-3 revs of the starter.
3. Run her up to ~23” and adjusted Injector Flow Rate - Mode #3 for approx Lamba of 1 on Wide Band
4. Set Idle of approx 1200RPM Adjusted Injection Dynamic Range - Mode #2 for same.

All OK to this point. Adjustments made in Mode #2 and #3 of EC2 reflect clearly on Wideband O2.
Switching between A and B computers makes no difference.

Now opening throttle up gets us to approx 5000 rpm (course Prop) but its missing as more power comes on and is quite severe. (Not missing now and then, but constant)
Selecting between A and B computers (Backup CAS) makes no difference)