It has random misfires on 1, 3 and 5.

MIKE2017

MEMBER
1997 DODGE DAKOTA
3.9L
V6
2WD
AUTOMATIC
100,000 MILES

Vehicle listed above is the Sport model. It has random misfires on 1, 3 and 5. Replaced plug, plug wires, distributor cap and rotor. Only misfires on that one side but sometimes on all cylinders. I clear the codes and the check engine light goes off then after a couple of days it comes back on. Sometimes it will bust up and act like its going to shut off and when that happens it seems like its starving for fuel. What could it be? I've been racking my brain and can't seem fix it.

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

We need to start with checking the fuel pressure to make sure the fuel supplied is correct.

If it is not, then we can evaluate that further. However, it is unlikely that fuel would cause an issue on just one bank. More than likely that would be an issue on both banks.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

If the fuel pressure is okay, then we need to monitor the o2 sensor data and find out if this is a lean misfire or not.

If it is lean, here is a guide that will get us started on this:

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

Below you will find the o2 sensor data info to determine if this is rich or lean.

Once we know that we will be able to better know what to do so let's start with this info and go from there. Thanks

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