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I've developed a problem post the main positive lead coming adrift from the alternator at Blyton. It "could" be an ECU issue, given that there was ample opportunity for the loose positive lead to short. Engine is 2.0l Dunnell Zetec injection. I've had the TPS off and cleaned it, put it back, reset the TPS via the Dunnell ECU, tweaked the TPS mounting and the idle screw and it's running like a dream, drives very well across all gears and styles apart from... when I get to around 4600 revs it bogs down completely, kind of like a rev limiter but much, much rougher and kinda scary. Get pas