Help - Motors won't fully spin, 250 quad, emax 1806 & 12a Simon k ESCs, HKPilot Mega Micro Flight Controller

Help - Motors won't fully spin. Quad will arm, one motor fully responds, other 3 flutter but SOMETIMES spin up with much plugging in, unplugging and general coaxing. Then, responding motors go back to flutter after disarm or throttle to zero.

Setup:
250 quad,
emax 1806 & 12a Simon k ESCs,
HKPilot Mega Micro Flight Controller
APM 3.2.1
Spektrum DX 8
Lemon rx pwm

What I've done:
APM setup multiple times (accel, mag, tx, etc.)
Group esc calibrate, haven't tried one by one yet.
New ESCs
Suspect esc switched to motor that spins.
Different flight controller
Reprogrammed ESCs with what emax manual suggests.


No joy on all the above. 3 motors oscillate and get warm. Can't get quad anywhere near flying state.

Suggestions?

Thanks, Eric Walters

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Can you test each motor/ESC with the receber? Will they spin properly?

You can calibrate your ESCS, and then increase slowly the throtle!

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