Hi I have a 1993 vigor that I love but it has been a nightmare for almost a year.I had the distributor changed last year and since then I have had two problems.1 when you start the car after it has been sitting for more then an hour there is some jerking.It feels like it is going to stall but the car shakes even more.Once it runs for about 5 minutes the problem goes away.2nd- once I drive on the highway at 100km/120km the car has some hesation(a slight jerking).I had the distributor replaced a second time,changed wires and plugs,Acura replaced the 02 sensor and fuel regulator.Then told me they couldn't find the problem I have taken it to other mechanics and no one can find the problem.Any ideas?

 

1. Main fuel relay (unlikely)
2. PCM
3. Bunk fuel rail