Ok, so I have a brand new M11, Spektrum pro module for it. A 3500 micro RX and a LRP sphere TC. All with in a few months old.

Some things that are happening when running the car. When driving away from me the car on full throttle drives fine. When coming towards me, motor/esc seams to shudder, but it doesn’t seam to drop signal to where the steering goes out.

I also notice if I hold the radio up higher, say maybe chest high, it works better. I usually hold the radio below my chest.

Another thing I notice is when the radio is close to the receiver the ESC blue brake LED flashes on and off inconsistently until I move the radio away.

I have tried doubling up on the servo tape under both the ESC and the RX. I have also moved the RX away from the esc to the top of the servo. (Before I had it right next to the ESC.) And it seams to get better, but not consistent.
The wiring is not messy, and way from the antenna.

Does any one have any suggestions?

Thanks in advance!

Have you thought about trying that Spektrum capacitor?

yeah, tried the novak glitch buster. no go.

I would try a different ESC or a different servo. Beyond that, it's hard to diagnose without seeing it.

Different performance going away vs. coming back at ya? What is you antenna set up?

My car steering works that way too, but I think it's my driving!