Replaced valve cover cleaned engine now car starts hard won't stay running not sure

So been having issues with my Geo just bought it sprayed off the engine ever since the car seems sluggish found a vacuum line came off replaced but car still has issue either have to have the gas pedal down or let go no in between or car starts to jerk, think this is a sensor issue, also changed out valve over due to oil leak didn't move the cam tried to put the distribute cap back exactly as it came of but now car has a real bad time starting if I get it going car won't rev at all tried to at least drive it can't go above five mph. Have no money for mechanic please help if you can I'm a diy so at least lead me in a direction ill give it a try. Mr.J