Premiere NYC Hudson and power pack

If you convert the passenger cars to LEDs you'll lower the amp draw and the Z1000 should be fine. You're sure there is no short in the cars tripping the breaker correct? That load *should* be under the 6amp limit of the Z1000.

Thanks Lou. That sounds like a good idea. what size LEDs should I use?

Ones that fit.  There are kits.  If you have access to an amp meter you can read the pull of the engine alone with smoke on.  Probably about 1.5 to 2 amps depending on which model Hudson. Then add the lighted cars one at a time to see what they draw.  8 at about .5amps would add another 4 amps in cars alone. Pushing the Z-1000 limit.  You could up to a Z-4000 or Lionel ZW.  G

its the #5344 Premiere not Railking. They came out when my wife and I got married in 1996 selling at $899. I did put the cars on one at a time and thought maybe it was the Willow Range. I figure it may be those bulbs in the cars drawing too much voltage. I've found some one selling the LED strips on ebay so I may start from there.

Take care.

Converting the cars to leds is a good idea.  I presume you are aware that leds “like” DC current while your transformer and train are AC.  As stated above, commercial conversion kits are available supplying all the parts you need.  Or, if you are a bit adventurous and have some minimal soldering skill, there are also DIY options from parts sourced from various suppliers.