I have a 2005 Dodge Ram 4.7L 2wd. Just replace the intake gasket and truck ran fine. When the truck really warmed up my check engine light came on and the performance went downhill from there. I checked the trouble code and it was a P0307 (misfire on Cyl. 7). I pulled the coil and plug to check the spark. The plug was covered with fuel and blackened. Still gave me good spark though. Also checked the resistance of the injectors. All the injectors had 12.4 -12.5 ohms. Everything seemed fine with them. I pulled the intake one more time to see if there was a leak, found that Cyl 7 did have a leak. Put everything back together truck started and ran fine. Took it down the road for a test run and the service engine light came on and the performance of the engine was so bad it did not want to get out of it's own way. I have parked the truck now for it is causing me to go crazy. Can anyone out here in the Dodgeforum please help me. I am not into replacing parts, I want a solution. Has me thinking the fuel pump may be causing this???

 

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I will move this one for you.

 

Ended up being a rocker arm. Pulled driver siide valve cover off and found a rocker arm had popped off. Replaced the lifter and rocker arm. POOF all fixed.