Savox servo question.....

[captain-codpiece]

Please can someone help me before I jump off the Severn Bridge? I have a losi excelorin 6.5, in a xxx 2wd, and have just bought a savox servo. Now it's not FET so should be ok. My friend has the same car/brushless and servo combo and it works fine. Only difference is mine is the 20kg torque servo, and he runs the 12kg torque servo. The problem is once the new servo fitted the speedo randomly cuts out. Its running 4600 nimh, and is on factory setting. I have v2 software. I have changed receiver/tranny/crystals, and it makes no difference. As soon as I put the old crappy servo back in, problem goes away. I am thinking maybe it's because the servo is drawing too much power? Has anyone got any ideas?

Captain