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2006 F150 Hard Start and rough idle

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  • #991382
    Keith OrtnerKeith Ortner
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      I have a 2006 Ford F150 4.2l that runs and drives great and gets good gas mileage. The issues I am having is starting the truck and a rough idle. Starting the is like having a dead battery or bad starter, cranking is labored and sometimes disengages. The codes I am getting is a P0302 and a P0316. Work that has been done so far, I ran Sea foam in the gas and have put 2000 mile on it since, checked all the fuses and connections, upper and lower intake manifold gaskets, new Motorcraft plugs gaped at .054, new wires, new Motorcraft coil, New Motorcraft EGR valve, new Napa Crankshaft sensor, new Napa Group 65 850 CCA battery that replaced a new group 59 590 battery that the truck came with truck. I have removed and cleaned all the grounds and have checked multi able times for vacuum leaks, swapped cylinder 1 and 2 plug wire to rule out a bad wire, changed that fuel pump driver module, cleaned the throttle body and the mass air flow sensor. I unplugged the camshaft sensor and it made no difference I have a new Napa syncro and sensor on order I didn’t want to disturb the sensor with out having the new part on hand.It seems to me that it sounds like a timing issue. Any help would be much appreciated.

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    • #991384
      Keith OrtnerKeith Ortner
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        Forgot to mention that I did a compression test and I have 180 psi on all cylinders.

        #991790
        Keith OrtnerKeith Ortner
        Participant

          Update on my progress, The cylinder 2 misfire I was having was due to a bad plug I bought a new Motorcraft plug and the issue went away. just because it is new doesn’t mean it is good.

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