05 Dakota 4.7 miss fire
#1
05 Dakota 4.7 miss fire
I have a 2005 Dakota with 4.7 I am getting a miss fire code on # 1 changed the coil pack with # 7 still getting miss fire on # 1 moved the plug from 1 to 3 then installed a new injector still get the miss fire code I am not losing coolent so i don't think it is the head gsaket the truck has 90000 miles what should i be looking for or change next Thanks for your Help Don
Last edited by melvilleauto; 04-25-2016 at 08:55 PM.
#4
If the plugs don't make a difference, then swap the fuel injectors. That one can get messy as you will spill fuel when you disconnect them. I don't recommend you do it alone. And make sure the engine is fully cooled down. Have lots of paper towels handy to soak up the fuel and a fire extinguisher.
#7
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#8
I had a misfire on my 07 4.7 with 180k and I couldn't figure it out so I finally just bought a 4.7 from a 05 1500. Finally got around to tearing the old engine apart and there was a rocker arm that somehow fell out of place. No idea how it happened yet. Still requires more digging that I haven't really had time for but I would suggest pulling the valve cover and checking.
#9
And if none of that works - compression test. Then it's onto valvetrain issues - I did all this on my mothers car and everything was good, spark, fuel, compression. Found a rocker arm had come out of place somehow, she had some bad gas and had to change the fuel filter also. I think there was detonation from the bad gas that sent the rocker off the valve.