Knock box wiring testing help

[rhock99@epix.net (Ryan H)]

> Are you sure this is an ignition problem? (have you checked that there is
> no advance by using an adjustable timing light?)

The problem comes and goes.  If I let it idle for a minute, it goes away, making timing it when it's running bad impossible.

> 
> How is your knock sensor? Insulation peeling off the wire? Bad torque?

Second replacement.  Retorqued several times.

> 
> Take off your air intake boot and make sure the air flow plate moves
> freely throughout the rev range and there are no obstructions or "stuck"
> spots.

Moves smooth.
Any other suggestions are welcomed.
Thanks!
Ryan