Replaced motor with new one. No start computer showing 29,000 rpm.
have fire at plugs, gas at rail but no gas though injectors. Need help

 

Because engines can no longer be switched with just another engine as in the past, sometimes electronics get into the picture and the can of worms also gets opened.

It could be something simple, but need to know as much info as you can provide , then after sorting out some of it we just might be able to help.
How did you manage to get the 29,000 reading?