Bucking at low loads

[Advobeast]

I am working through the tune on my gen 2 Coyote swap and I am experiencing bucking during light load cruise. I notice that when at light load the exhaust cam phase angle goes to 40 degrees. While it is in this position, you can feel the car "bucking" like it has a cam with allot of overlap. the misfire counter starts going up as well. If I decelerate or accelerate the cam goes back to 0 degrees and smooths out. i have IMRC locked open with an 18 intake. Can anyone look at this and see if there is any glaring problem?

[Advobeast]

I believe that it is being caused by the mapped points being used without IMRC. I just made changes to the distance tables and mapped points to see if this helps.

[B E N]

Did your swap end up working without disabling PATS?

[Advobeast]

Did your swap end up working without disabling PATS?

The control pack strategy? It did not. No start. I looked at it with FORScan after loading it and it came back with corrupt database. I am still having problems that I am trying to sort out. It appears that the PCM is loosing it's non-volatile memory. The HPTuners crank relearn does not appear to work. If I use FORScan it works (no cylinder 4 and 7 misfires). But if i let it sit for an hour, I have to do a crank relearn again in order for the misfires to go away. Strange.

[Advobeast]

To close the loop on this thread. I believe that I have the issue resolved. I looked at my logs and compared cam positions to a gen 1 configuration (they don't use IMRC). In the area that I was having trouble (Fuel Economy), the gen 1 has both cams at 0 deg and about 35 deg of timing. I configured mine to use tables 14 and 15 only while in Fuel Economy and the surging completely went away. Seems to transition to Optimal Stability smoother as well.