Nikon FE2 shutter problems

[pompiere]

I bought an FE2 a couple of years ago at an antique mall. It didn't have a lens, but it was only $10, and I figured I would run across a lens some day. So, now I have a lens, but the shutter speeds are making no sense at all. Every speed acts differently, depending on if the battery is installed or not. The fast speeds stay open for 2-4 seconds, A is about 1/15, some speeds act like Bulb. It is supposed to have a mechanical speed of 1/250 for if the battery is dead, but when I take out the battery, the shutter stays open. With the battery in, it looks about right. I thought that it would work only on M250 if there was no battery, but 1/125 looks about right.

Does anyone have an idea what might be wrong?

Thanks,
Ron