Upgrading the cable will do squat. A simple analogy, think of a pipe with water running in it. No matter how big you make the pipe you cannot increase the amount of water in the pipe without increasing the supply of water. Same principle in electrics.

Do the simple checks as per Tuna's recommendations above.

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[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]