help with problems new to this car

[plati13]

i have an 1987 supra turbo 5 speed
ok well first thing is is i hear a clicking noise when reved not at idle and then it also vibrates when reved not at idle and the vibration with happen when you go to take off and it dogs down when driving it has no balls at all, and then on the highway the only way the boost is on is when my foot is on the pedal for about ten seconds then it comes on to about 1 psi if that maybe a half and i have a valve cover leak and wondering about how long and how much of a pain will it be to do it and how much it will cost

and i thank you for any help given

[Isphius]

Clicking, Maybe a valve, rod knock, detonation, Things like that. As for boost, make sure you intercooler/air pipes arent leaking. Maybe hard to see sometimes, But check as best you can. And does your car smoke at all? could be a bad turbo...but i dont have much experience with toyota turbos. The valve cover gaskets arent hard to change, Just get the gaskets, take the throttle body off, and unscfrew em. Might as well change the plugs while your in there, Cause the TB blocks 2 of them.

[plati13]

car does not smoke and the tick does seem like a valve tick it sounds like air shoots through a tube so idk what it could be

[Isphius]

hmm, Do you mean air shoots through a tube is the ticking sound? if not, Then id def say you have a boost leak. Replace all your intake tubing. And make sure your air bypass valve is holding boost, Just blow into it and see if it holds. And if you rule out all those things, You might need a new turbo. But i would doubt it if its not smoking or leaking oil.

[Isphius]

is there anyway you can record the ticking noise? I forgot to ask that. That would be helpful