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Re: 88 pinging
When you had it scanned what was the knock count? If it was pinging and the knock count was low, it can indicate a problem with the knock sensor.
I have also seen the harmonic balancer shift on hub resulting in the wrong timing being set.
What is the timing set at with the brown wire disconnected? Was is it at when the wire is connected at idle?
//2000CAYukon
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