5.0 engine knock

[90_Fox_body]

hey guys i recently just got my 1st 5.0... its got a knock in the engine...ill be driving and shifting through the gears and you hear it when you left off to shift and also when holding the gas at a steady speed on the interstate or something..and its very annoying and noticable and also it likes to idle kinda high..it starts up and idles at 1000 rpms but then when you give it gas it idles back down to 1500 then idles down after a few minutes..and after driving on the interstate for a few minutes it takes a pretty good while to idle back down to 1000

any help is appreciated
thanks, brandon

 

[84Ttop]

Your high idle seems like the least of your worries. I've seen cars w/ a loose flywheel make a knocking noise, but if it is the bottom end, you will be looking towards a rebuild.

 

[Stang GT 89]

happen to my buddy you most likely threw a bearing man. gunna have to rip apart and replace