GEN 2 Misfires on cylinders 1, 2, & 3

[dplakosh]

I have been dealing with some loss of power issues that were related to a p0420 code for a while. The other day while coming down the highway I started getting really bad misfires in my truck. When looking at the codes it says that 1, 2, & 3 are misfiring so the passenger side of the engine. Anyone else experienced this? If so, what was the solution?

I had the cats replaced. Plugs were replaced in August but I pulled them and they looked fine. Moved a coil to the drivers side to see if that loved a problem but still misfiring in the same 3 cylinders. Not sure what to do next. Was going to take it to ford but they are 2 weeks out from touching it. Would like to get it on the road sooner than later. Going to do a compression test in a few. Anything else that anyone can recommend?

 

[Space Ghost]

what do the plugs look like?

 

[dplakosh]

what do the plugs look like?

I cleaned them off but this is what one of them looked like before I cleaned it with a wire brush.

 

[Space Ghost]

I cleaned them off but this is what one of them looked like before I cleaned it with a wire brush. View attachment 441875

how many miles since august?
Looks like may have been running rich, is the truck tuned?

 

[dplakosh]

how many miles since august?
Looks like may have been running rich, is the truck tuned?

Probably around 4,000 miles.

Truck is not tuned. When I got the CEL for the cat, the fuel economy did drop about a mile a gallon.

 

[Sharpie69]

any cracks in the ceramic portion ?

 

[dplakosh]

View attachment 441958any cracks in the ceramic portion ?

Checked that the other day and didn’t see any. Also inspected the insides of the boots to see if there was any tracing inside but everything looked good.

 

[Sharpie69]

Checked that the other day and didn’t see any. Also inspected the insides of the boots to see if there was any tracing inside but everything looked good.

The plugs kept cracking like this, for me, not from over-torque, I ended up having to change out all of the coil packs to correct the misfire problems I kept having

 

[Monkish1]

How many miles on her? If plugs looked ok, and problem didn't follow injector its telling its only one side of engine. Possibilities include cam phaser or ecu issue. My 2 cents which is probably all its worth. LOL. Good luck, I'm certain you'll get it squared away.

 

[dplakosh]

How many miles on her? If plugs looked ok, and problem didn't follow injector its telling its only one side of engine. Possibilities include cam phaser or ecu issue. My 2 cents which is probably all its worth. LOL. Good luck, I'm certain you'll get it squared away.

It has about 107k miles on it. I didn’t move an injector. Just a coil pack. I’m thinking that the one side isn’t getting fuel or spark for some reason. Not sure why. I’ll check spark today. Compression is at ~150psi.

I thought cam phaser was a noise, not a misfire condition.