1994 Dakota intermittent misfire
05-15-2008, 04:59 PM
#1
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1994 Dakota intermittent misfire
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?
05-16-2008, 07:49 AM
#3
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scan tool
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!
05-16-2008, 09:21 AM
#4
Admin
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.
03-13-2010, 12:55 PM
#5
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Dakota
Have you figured out the problem? My truck does the same thing and we are unsure. We have done everything even replaced the intake manifold gasket (plenum gasket) and it still randomly misses. It seems to be something with fuel but the pressure read ok.
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