I am having a lot of issues with my 2002 ford escape, a while if I drive the truck acts normal, but after driving it starts missing when beginning to accelerate at a dead stop check engine light starts flashing pulled codes coming up with #4 cylinder misfire and #5 cylinder misfire detected, also a catalyst system below threshold bank 2, I have had the vacuum lines repaired and still no changes and went through and changed my grade of fuel from regular unleaded fuel to premium fuel, actually went worse with using premium fuel. I was thinking of replacing all three coil on the front of the motor, putting new plugs in it and seeing what that does. any help would be appreciated!

 

How many miles? Plugs are good for 100,000 miles I would do plugs and lower and upper intake manifold gaskets. There is a good write up on how to change them.Also good time to change the pvc valve.
https://www.ford-trucks.com/forums/4...ark-plugs.html

 

Thanks for the info, I have close to 168,xxx miles on it, I see they have changed the spark plugs around 121,000 miles, I have ran a full live data stream on the truck, shows no data of a misfire, I also checked my o2 sensors both downstream and upstream on bank 1 are pretty much running around the same, and bank 2 upstream is good but bank 2 downstream drops off the charts, but when taking off it starts to read, I was thinking off replacing the spark plugs on bank 2 and the same for the coils on bank 2.