My buddy did a zc swapa and at 4k it just boggs out andy suggestions

 

How about a little more info.

 

wow dude, you're definitely gonna have to give a bit more info than that.

lol.

Are u trying to say at around 4k rpms the car is rev limited? That could indicate the ecu switching to limp-home mode ..

any check engine lights?

 

Ok, did he remove the timing belt? If so it might be off a couple of teeth....