Check for loose wire.
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Hmm. Hadn’t thought of that. I will when I get back home
dont get discouraged with a single drive! I ride a balance-discharge 10s 149kv single drive with an Ollin Vesc for 3 years now and take it up and down steep hills daily without problem. Only “issue” I have is a mental thing where I’m used to releasing the trigger when I’m coasting, and I sometimes accidentally do this when going down hills 
otherwise I’ve had no issues except for when the wheel cant grip the ground
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Check the caps are connected properly. Might have broken from vibration.
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@Ackmaniac was right. Soldered the hell out of multiple leads, checked everything, all is well again. Thanks everyone!
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I definitely have love for single drives! I just love duals too sounds like a great setup!
Battery Current 90A is too much, also motor current is a tad much. Focbox and others like it can take 50a continuous but to be safe i wouldn’t set it higher than 40a, but thats my opinion. But 90a is something i haven’t seen so far, except normal esc
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I’m having this problem, which wires should I check. All the wires on my vesc appear fine