2014 4th Gen Missfire

[Matt Jackson]

I have a 2014 5.7hemi, done approximately 146k miles. Developed a miss fire in #6, done the plugs and coil swap, started up and was making a tapping sound (no tapping sound before just rough), reved it and it went away but comes back on idle. Thinking it’s the mds solenoids so went to work on that. Got it stripped down for swapping those out and put rags in the intake holes while intake was off. Had to stop at that point and call it a night. Accidentally remote started the truck at this stage, nothing happed and shut it down turning over quick. However did notice that all rags stayed in the ports apart from #6, is that a massive coincidence or is there a deeper problem here? I don’t want to do the solenoids, put it all back together only to have to take it apart again. On a side not I did find that the harness going to the solenoids was not good and melted to the top of the engine so going to replace that as well.

Codes I got when noticed the miss fire were u1449, P0306 and P1416. I got these before I did anything to it.

 

[MrHarleyGuy]

Your in the 5th Gen area.

 

[Wild one]

I have a 2014 5.7hemi, done approximately 146k miles. Developed a miss fire in #6, done the plugs and coil swap, started up and was making a tapping sound (no tapping sound before just rough), reved it and it went away but comes back on idle. Thinking it’s the mds solenoids so went to work on that. Got it stripped down for swapping those out and put rags in the intake holes while intake was off. Had to stop at that point and call it a night. Accidentally remote started the truck at this stage, nothing happed and shut it down turning over quick. However did notice that all rags stayed in the ports apart from #6, is that a massive coincidence or is there a deeper problem here? I don’t want to do the solenoids, put it all back together only to have to take it apart again. On a side not I did find that the harness going to the solenoids was not good and melted to the top of the engine so going to replace that as well.

Codes I got when noticed the miss fire were u1449, P0306 and P1416. I got these before I did anything to it.

If you have it stripped down that far,it's not a big step to pull the valve covers and check the rocker arm movement on #6 while somebody turns the engine over.