[quote]...when i disconect the vacuum advance on the dist and plug the port it idles great at about 700rpm but once i hook up the line to the dist. the idle jumps up to about 1200-1400 rpm. I know there is supposed to be a ported vacuum port and a full time vacuum port on this carb but it seems that both ports are getting vacuum all the time as ive hooked it up to both sides<hr></blockquote>
The distributor should be connected to the ported
vacuum port (above throttle blade level). If not able to identify visually, find correct one with vacuum gauge. But it sounds like you have one of two problems (or both);
- The vacuum advance cannister diaphram is leaking and causing a vacuum leak and/or;
- The advance weights are sticking/binding (broken advance springs) and throwing base timing off when vacuum advance is applied.
If you have a dwell meter, check distibutor operation for erratic advance/retard. But it also could be as simple as having the advance mechanism connected to full manifold vacuum.