Update, after messing with the truck for few day checking it from top to bottom I decided to get a new set of spark plugs wallaaa the truck seem to be running like before. Some how all the other spark plugs were defective. Been running it for a day or so and I have no check engine line but two other codes that keep coming up in my edge . P0316 misfire startup and P0306 misfire #6 this is the orginal code y I replace the spark plugs. So the truck is running has power, but idles a little rough. Has brand new plug on that cyl and I swapped coils to see it the code went to the other cyl but didnt not happend. Im leaning towards sticking injector, what u guys think? any other things I should check for this code.

 

What are you using for plugs? Brand and number.

 

You're gonna be seeing those codes come back, 171&174. And when you do, replace the entire PCV system with a Ford part. The hose has pin holes in it or the elbow has holes in it. It's a common problem giving these codes. It will also give you a rough idle and a light miss.

 

Motorcraft SP-507

 

Doubt it, if it had a vaccum leak wouldnt just go away.

 

Made my trip from MD to VA today, ran good and got 18.7 mpg

 

Another Updated swapped Injectors and Cop, between 5 & 6. Ran good for a couple days that was warm higher 60's got cold and this morinig and the rought idle is back. No engine light but code P0306 is on again. I'm a little stumpped, not sure what to do next? I might replace the plug one more time and maybe look into cleaning the intake manifold. What u guys thinks?

 

Code keeps coming up but goes away when it warms up sometimes but no check engine light. Did a compression test came out perfect. swap cop and inj no change also new spark plug the engine idles a little rough in cold start but once it warms up it goes away. Im leaning toward a clogged injector port on the intake manifold or maybe the ECM. Any suggestion.

 

You could have a small vaccum leak just on that port. Most shops will have a smoke machine that will feed smoke into the intake and show any vaccum leaks. Might be the only way to find it.

 

It being kinda warm here n VA 60+ degrees so the truck being running good, code is gone I guess have to wait till it get codes again.

 

Code is back no check engine light. Im dont want waste my time or money taking it to the dealer be a waste. Any suggestion? btw compression was perfect