[18jsmeal]

That's probably best. Try not to drive it until then.

Another thought -- might be worth replacing or checking the stock knock sensor. If it's loose and registering false knock, that could explain the whole issue. Normally I wouldn't think that would be the case, but since the shortblock was replaced perhaps it was reinstalled incorrectly.

Thanks... I already thought about the knock sensor so I might do that. But again... thanks for all the help. I'll report back when it gets fixed.

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