What connectors are on the battery? You might try changing them/resoldering them and even shortening the wires while you are at it. Sure sounds like a bad connection/battery issue.
But it could be anything really.
You have a fat truck but still the MM should be ok... my CRT is almost 12lbs and I have never seen this.. and others have a similar setup to yours wihtout a problem.
Is it cold where you are? Is the battery at least at room temp?
Jammin CRT MM/Neu 1515 1700kv
Losi 8IGHT MM/Neu 1512 1900kv
Kyosho 777
T4 MM 5700
B4 LRP
XX4 MM 7700
old losi xxcr, MM4600 4s lipo 70mph+
I do have good NIMH's. A few pairs. It was one of the next things to try. My LIPOs only get slightly warm but only after extended use (< 90 F). The LIPOs have been at room temp when I use them.
I do have the red wire cut on the ESC....using a 5amp ubec but I'll try a rx pack. Any chance the rx has anthing to do it it? I'm using the stock AM rx that comes with the savage. I have a Spektrum rx for it but havn't installed it yet?
I found the problem!!!!!! I was still using a on/off switch between the ESC and rx and as I was going over all the wires while installing the Spektrum rx I noticed a very small cut in the switch wire. It was a deep enough cut that at least half the wire was severed. I pulled the switched out.....never really needed it anyway....and all my problems are gone!!!!!!