6.8L Help Needed !!!
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6.8L Help Needed !!!
I have a 2003 F20 Lariat 4x4 with a 6.8L V10 in it and it is acting up. I am getting code PO304. I have changed the number 4 coil pack(twice just to make sure I didn't get a defective one) and the number 10 coil pack just in case it was the fourth coil in the firing order and have replaced all of the injectors and the code is back. On a cold engine I sprayed it down with starting fluid to make sure I had no intake leaks. After I clear the code it will run for 60-110 miles before the code comes back. I am at a loss and everything I now do is chasing my tail. It's not like the code comes back immediately otherwise it would be easier to find the real issue. Fuel pressure is up and it just seems like a constant random (I know but it was the best way to describe it) misfire on cylinder four. Can anyone help or give me an idea as to where to look next?
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