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2004 Dodge Dakota Check Engine Light Flashes and Stays On: Random Misfire Code P0300 with Intermittent Shudder on Acceleration

Model: 2004 dodge dakota Fault Code: P0171 Posted: 2015-11-18 15:25

My 2004 Dodge Dakota has a persistent check engine light that flashes and remains on for several days. The truck runs fine under normal conditions, though it exhibits a slight shimmy when idling. After being taken to two different mechanic shops over three weeks, the only diagnostic result shown is a random misfire code (P0300). The light clears after a few days, but the vehicle still performs normally—except for occasional shuddering during acceleration when exiting parallel parking. When accelerating from a stop, especially at traffic lights, the engine bucks and surges; however, if gently feathered, it smoothly accelerates without issues. A recent hard start occurred after bringing the truck home, but it eventually ran to speed with the check engine light still flashing. The mechanic replaced all spark plugs and tested each coil individually using new replacements on both sides of the engine. An engine pressure test was also performed, showing no signs of random misfires. Despite multiple visits and thorough diagnostics, no root cause has been identified. I am now seeking further guidance on potential causes, especially given the intermittent nature of the symptoms and the flashing check engine light.

Related fault codes
P0171P0172
Comments (4)
Anonymous 2015-11-18 15:38

Flashing check engine light indicates a serious issue—potential catalytic converter damage is likely. Since you've already addressed ignition components, focus on fuel injectors. Try adding a can of SeaFoam or Techron fuel system cleaner to the tank as a starting point. Then perform a fuel pressure test and monitor for leak-down under KOEO (Key Off Engine On) conditions. Please specify your engine type—4.7L or 5.9L—and whether it's stock configuration, as this affects troubleshooting.

Anonymous 2015-11-21 09:15

The vehicle has been at two mechanics for over three weeks with no resolution. It’s time to take it to a different, reputable mechanic—one certified by ASE (Automotive Service Excellence) and experienced in diagnosing complex engine issues like intermittent misfires.

Anonymous 2015-11-22 15:16

I use BG44K and SeaFoam on my 4.7L engine at least three times per year to maintain fuel system health. This has helped prevent some of the symptoms I’ve seen in older diesel engines, though results may vary.

Anonymous 2015-11-22 15:17

Thanks for the helpful input—this is very informative and gives me a clearer direction on what to try next.