I have a 1994 jeep cherokee i changed the manifold the old one had a crack it had power when it was busted but i put this one on and it idles fine and runs fine until it gets to 2500 rps then bogs down like it get flooded but it dont kill the engine it just loses power iv tried everything i know

 

Note from DJ
First Welcome
Now you know some things that we need to know in order to help you.
What engine do you have in your Jeep 4.0 or 2.5?
Automatic or manual transmission?
Which manifold did you change intake or exhaust?

 

Its the 4.0 and you have to change both