Random Knock

[95tsi]

Car is a '95 Talon with dsmlink, t28, 550's, exh. I changed my factory boost gauge to read knock and the cel to flash on after 2 degrees.

So the problem is, that under normal driving(not in boost) the cel flashes on and the boost gauge(knock) climbs up to around 1/2 way. This only happens in 1st gear and while not in boost. If I go WOT logging says no knock and everything is fine. Any ideas? Maybe just a bad knock sensor?