Hi guys just thought I'd post an update. I've started fault tracing again and have bypassed the control valve and engine pads taking the output from the vacuum pump directly to the vnt governor. All is well. I'm puzzled because the hoses and pads are all holding pressure. I'm thinkin. I'm thinking there maybe a fault with the electrical signal to the control valve or bad connections. I can't think what else it could be??
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