[EdHolland]

I think he means, is the IF stage oscillating by itself? This can happen. One of my restorations was missing a bypass cap in the IF stages, and the stage would regenerate or oscillate according to how it was adjusted.

The replacement coil may also be the issue. It's a clue that you cant get the dial even close to the received station... If you can follow the oscillator with a frequency generator or another radio, set things up to receive and find the oscillator signal +450kHz from the received station e.g. 1050, for the station on 600 kHz.