I had a 86 900 T with the same problem.
They said that the wiring to the APC box was corroded, or the insulation
was bad and there was some shorting, etc.
They fixed it for $27.50 but said I needed $450 worth of more work. Car
goes like hell. I can almost spin the wheels in second gear at 8,000
feet elevation.
Go figure.
themodernoman wrote:
> I’ve checked everything that I could and everything seems ok. the
> boost gauge use to go to the red when I accelerated but now it only
> goes up to the broken lines on the turbo boost gauge. please help!!
>
>
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