I have 2005 , 5.7, Durango. 300k+ miles on it.. When accelerating the check engine light flashes and and the truck shutters and shakes until you get to a higher speed. This was happening between 50-60 mph.

We did have new plugs put in and it helped for about a day. And now it does this between 30-40 mph.

What could be causing this?

It did through a code about an o2 sensor.

Any feedback would be appreciated

 

Random misfire. Will result in serious damage if you continue to drive it. Could be coils, plugs, etc. Checked for codes?

 

The only code was o2 sensor, drivers side.