I thought it was bettary's problem because my battary was out and now i changed a new battary but it still does that, and i set the idle speed, now it won't goes up and down, and i don't have this problem before, i have no idea why , can anyone explain? also what kind of oil do you guys use for 93 FD turbo?

thanks

 

you mean it rev's up and down a little bit right? like right around idle....just goes, vrrr-vrrr-vrrr-vrrr-vrrr

haha....

mine use to do that. turned out my lower intake manifold gasket was crapping out...had to replace it...what a bitch :|

 

oh thanks, for your info

 

mine is like goes almost down below 500 rpm

 

idle wasn't set and the idle control solenoid was freaking out?

seems like a simple thing if you just adjusting the idle fixed it.