'91 Range Rover Won't Start

My '91 Range Rover doesn't start whenever it rains. Water seems to be getting in from the right side of the sunroof. The engine would crank (starter working), but not fire up. The car would always start right back up as soon as it dried up, that is until now.

Any ideas?

Thanks in advance.

1991 Range Rover - 173K miles

Sound like eletrical issue. I would use a water spray bottle on a dry day with engine running to try identify problem. I've never had ignition coil problem but maybe you do.

You might also try down by the Distributor Cap. Mine had a problem with the coil connector and when it was damp the connections weren't tight enough for proper contact. I ended up zip tying it on where it was tight and that solved my problem