I have encountered a surging problem. While trying to fix a few other problems with my 85 T/A I seem to have created a new one that I haven't been able to figure out. The car is stock with the cc quadrajet carb.

The surging only occures while in drive. Either At part throttle during take off or once the car reaches cruising speed. The car is still pulling almost 20 inches of vacuum and it doesn't seem to drop any. There are no check engine light when this occures. ( These problems were fixed. ) I am suppecting something with the carb. I have rebuilt it and it seems to be adjusted properly. This all started around the last time I was tinkering wit the carb. Any advice would be greately appreciated.