Ok so i have a 5.4 2006 xlt, i have 120k on the motor. I had new plugs put in(no plugs cracked), and i did the coils. After the work was done p0300 came up i put new coils in angain, cleaned the air filter(amsoil dry filter), and i replaced my fuel filter about 30,000 miles ago. Should i pull all the plugs and put new ones in.
Any ideas on how to fix this?
wait until you get the p030x code that identifies the cylinder. Do you have a noticeable miss? What plugs did you use? I'd get it to give the cylinder code if it were me before you throw any thing else at it..
Yep, -PO300 "Random Misfire" just informs the tech to mode 6 it, - the info is recorded in cylinder history. Does us absolutely no good, we don't have that $10,000 diagnostic equipment to read it's mind...
I'd push the engine until the CEL blinks 5 or 6 times. Once that happens, do this one more time, - maybe the scanner will give you better direction once that's been achieved. It's worked in the past.
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