I have an 02 dodge 1500 4.7L, I had a P0304 code, then a P0354, I checked the plug it was gunky and wet. i changed the plugs, it was time anyway, Cylinder 4 and 6 were gunky and wet, still missing, changed the coil on 4, still missing. I've tried changing injector, intake manifold gaskets, and loosening the exhaust flange, still misses. Did a dry compression test, was getting 120 psi. still missing. I checked the plugs again, 4 and 6 were wet with gas and starting to get gunky again.

Any suggestions?

 

Hi it sounds to me that one or more injectors are not shutting off. check fuel regulator,fuel pressure and when you did a compression test 120 across all cylinders? how many miles does the car have? good luck

 

just over 200,000 miles. I've been told It might be the computer or the piston rings. I'm not entirely convinced it's the computer

 

do a google on code p354 u will see its not piston rings

 

So after new plugs, a new coil, new injector, new intake gaskets, engine still runs rough, missing, I can hear a tapping while running, Cylinder 4 and 6 plugs will be gunky when I remove them, when I changed the intake gaskets I noticed that the intake on cylinder 4 and 6 were dry as the rest were wet. what else can possibly be causing miss fire?

 

valve spring