Ka24E Help

[Learningsideways90]

OK i understand forum rules. But i need help ive done the honda thing and out grown kiddie power but it taught me the basics. i traded my honda for a 90 model 240 se and now here is the problem it misses at 3k on the tach if im pressing on the throttle not flooring it but about half way if i let out or floor it it smooths out there are too many variables for my little knowledge. Harness is chop cut rebuild style (hacked up completly). Need motor mounts bad. Need struts so i dont bounce down the free way lol. I was told the vacuum system is crutical and i dont think mine is up to par any help or solution woild be great. Also any parts that could be kicked my way would be greatly appreacited not asking for aftermarket hand outs just dont have alot of money and stock parts you may have laying around and want to get rid of.