1994 Dakota intermittent misfire

[David Blair]

I have a1994 Dakota 3.9 v6 that misfires occasionally.I have exchanged all ignition parts with those from a truck with no miss but cannot cure the problem. New wires ,new plugs.new rotor and cap didn't fix the problem.The fuel pressure is about 3 lbs low but doesn't change when the miss occurs.It might miss ten times a day or not do it for a week .It never lasts long enough to identify the cylinder or cylinders involved.Usually occurs just before or just after the 1-2 shift(automatic transmission)Pulling hard like up hill doesn't make it miss. What do I try next?

[78D200]

scan tool will help to id which one(s) of the cylinders is misfiring. I'd start there.

[David Blair]

This is too old for OBD11.Scan tool shows no codes except for the ones created as I swapped sensors,which I erased.i have read that a fuel pump can cause this problem even with pressure that is within specs.What do you think? A fuel pump is expensive but worth it if it is the cure!

[78D200]

I have heard that also about the fuel pump. I can't tell you for sure though is that is the problem. Hopefully there are a couple of dodge techs here that will chime in.