[Ggmac]

Do you have a vacuum gauge ? If so see what its reading , see if low and steady or it fluctuates . Check for a leak at the vacuum wiper connectors , and vacuum brake , next i would eliminate each cyl one by one and see if itll tell you which one . Next Id do a compression check on that cyl and on each side of it . If everything is okay idstart looking at fuel or electrical . Your vacuum should be a steady 19-21 if a healthy motor . High mileage may be 16-19 but always a steady needle . A bouncing or dropping needle indicates a sticky valve or dead cyl ( plug , wire , vacuum leak , etc . Good luck . Im a little far from you but willing to help .