Im having a problem.... My car when its cold runs it idles fine, runs fine. When it starts to warm up, my car starts to miss.... I pull the spark plug wire on cylinders 1 & 2 and it doesnt affect the way the car runs. I look to see if im getting a arc from the wire and i get a really small arc, sometimes nothing. It comes and goes as it pleases.

I have already replaced the spark plug wires, spark plugs, the and rotor and cap are 2 months old.

I can only think that there is something wrong in my distributor. What inside the distrubtor controls the spark in the firing order?

My engine vaccm is pulling 5-15, before this happened i was pulling 20-25

Any help would be apprecatied.

All this happened after i put on a aem fuel rail and adjustable fpr.... I really dont think is has anything to do with my problem im having. I also have checked for vaccum leaks and there isnt anything, and my compression in all my cylinders are apprx 220.