Does it do it all the time? ie. when it is both cold and hot?

 

yes when I was at the stop light it was hot ... now its cold and still doing it...
I just changed the cap & rotor and all the vacuum hoses spark plugs and wires... still doing it idels then goes down to about 200 rpms then back up, then back down then up then down just keeps ideling like that ... starting to pee me off

 

now i'm starting to think eather its the carb or the gas filter is dirty hmm

its wird if I hold the gass to 2000RPM's it dosent do that anymore even if I go over 2000 rpms... it only dose it at idel speed

 

Most likely you have a fuel filter stopped up.

 

take the hose off the end off the booster andput your finger over the hole see if it stops surging

 

I have a way of finding vacuum leaks....it works best to find leaks on the intake and fittings.
Start the engine, get a can of WD-40
Spray the WD-40 on the gasket seams, and fittings...if one is leaking the engine will smoothe out when the WD-40 meets the leak.

 

whats a booster? and surging?

 

I think the problem is in the idle screws.When they are not feeding equally on both sides this will happen.Adjust them by turning them in to where they are tight,count how many turns it is.It should be around 2 full turns out each side.Im betting there is a difference in the amount of turns you find.

 

ok i'll try

 

Either the needle has a piece of trash on it in the carb or the float is sinking. Just my .02