It has random misfires on 1, 3 and 5.

1997 DODGE DAKOTA

100,000 MILES • 3.9L • V6 • 2WD • AUTOMATIC

MIKE2017

MEMBER
1 POST

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.

Jun 9, 2020 at 11:44 AM

KASEKENNY

✓Experienced 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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Oct 20, 2021 at 8:23 AM

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