2012 Ram 1500 5.7 misfire cylinder 8

[kadog710]

Have a p0308 misfire, a p2311 secondary circuit D and a p0113 iat hi voltage.
Checked coils by switching, same with spark plugs. Used test light to check pcm to coil pack signal. Compression tested at 180psi.
Can hear a slight tick on that side, other side has the tick from exhaust manifold leak, has 4 broken studs in it. What things should I look for under the valve cover? Just can't figure it out why these 3 codes. Even put a new battery in it, as old one tested bad. Any tips/advice is much appreciated

 

[StateOfMind]

Have a p0308 misfire, a p2311 secondary circuit D and a p0113 iat hi voltage.
Checked coils by switching, same with spark plugs. Used test light to check pcm to coil pack signal. Compression tested at 180psi.
Can hear a slight tick on that side, other side has the tick from exhaust manifold leak, has 4 broken studs in it. What things should I look for under the valve cover? Just can't figure it out why these 3 codes. Even put a new battery in it, as old one tested bad. Any tips/advice is much appreciated

Following this, because everything I would've suggested you have already done

 

[aszumilo]

Check for a broken valve spring, bent pushrod and any other bad associated parts.

 

[kadog710]

Check for a broken valve spring, bent pushrod and any other bad associated parts.

Thank you, that's the next plan then, are those rubber valve cover gaskets reusable if you don't chew them up removing them?

 

[aszumilo]

Thank you, that's the next plan then, are those rubber valve cover gaskets reusable if you don't chew them up removing them?

Not sure. I would guess it depends on the age of the gaskets. If they are reasonably new, they should work. If they have been on awhile, i would replace them.

 

[kadog710]

Thank you, here's what I have so far, a lot of slop in cylinder 8 exhaust rocker and a very small amount on cylinder 4 exhaust

 

[kadog710]

Video