ok, this 89 sc i bought doesnt idle good when first started and after restart when its warm.it will die unless given gas,but after about 30secs it will idle on its own,but its a kinda rough idle. and i thought the guy had some kinda cold air intake,but when i checked it out there was no filter.so that couldve been what started it,i guess.so any input to what it might be would be great.