hi there, first off admins forgive me if this is in the wrong spot, ok i hav a 1990 Integra GS and when i start the car it runs fine for about 3 seconds and then i'll get this werid reving and i'll rev up and down until i shift the car into gear and then it'll stop but as soon as i shift back to park it'll start again and it's affecting my car's stereo's system too so i'm guessing electrical now some people told me to replace the rad cap and i kinda found that werid but i tried it and that did nothing so please help me someone! any help is greatly appreciated