hey guys hopefully you guys can help me out i have an 85 300zx turbo and just recently my car has been doing funny stuff such as it just starts losing power it lasts anywhere between 10 and 45 seconds and then perks back up and what i mean by lose power is i will be driving down the road and normal speeds and then all the sudden it feels like someone pulled the ebrake halfway and its not the brake so dont ask if i hit the clutch when its doing it it barely idles between 300 and 700 rpm plus my car decided its idle was to low on its own and bumped itself up to 1200 rpm idle what do you guys thing this could be

ps no after market mods except free flowing exhaust which i put on after ward because one guy said it might be my cat i didnt believe him but it was a little clogged so i did it anyway

so aparently no one can help