Need help with ESC problem!

[jsr]

I've run with this setup for a while now and it just started having this cutting-back problem this past weekend. I do have the program box for the ESC and can try changing the timing and punch to see if that will do anything. I haven't tested it on the bench. BL motors tend to overheat when not driving a load, so I don't want to risk that (especially with Medusa gone).

The ESC and motor have always run cool...max of 120F on either even on a relatively hot day (80F) on a big track. Don't know what changed.

Maybe something broke internally as the track is BIG jumps and I tried singling a big triple a couple of times this last track visit and didn't make it. I didn't tumble and crash, but I landed on all 4 wheels on the rise of the last jump. But the track has some big rough spots too so the suspension is pretty soft and I bottom on the big jumps, so maybe the impact finally made something give?

Any other ideas on what I can investigate? Thanks for the help.