1st post.... I have a 1984 500 SEC Rebuilt transmission in FEB '10. Ran grate for a few months. Now at sometimes random under load and after it warms up I get hesitation when stepping on the gas. I replaced the Fuel Filter and had the FPR checked for contacts. Problem remains. I really notice it when the car is at operating temperatures or warm since I live in FL. I have done a search on all the forms found some stuff on Rotor Cap etc, and bubbles in gas lines but none seem to match what I am getting. Any help would be much appreciated.