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ford 5.4L help

Discussion in 'Ford Trucks' started by kmkalf, Nov 30, 2011.

  1. kmkalf

    kmkalf Junior Member
    Messages: 11

    currently we have a '06 Ford E350 5.4L in the shop that had a code for cylinder 3 misfire (believe code is a p0308), my fellow tech replaced all spark plugs- cylinder is getting spark by a visual check, ck for fuel out of the #3 injector and was not getting any- replaced the injector and still not getting fuel, currently there is no engine light on and we are physically able to unplug the ignition coil for that cylinder and hold it outside the van and there is no change in engine performance and the engine light never comes on. We are at a lost for words here. Any help is greatly appreciated.
  2. Too Stroked

    Too Stroked Senior Member
    Messages: 573

    Bad electrical connection in the harness to the injector? Only two reasons an injector won't fire: no fuel or no juice.
  3. wrtenterprises

    wrtenterprises Member
    Messages: 73

    Coil pack. I believe each cylinder has one....
  4. Brian Young

    Brian Young PlowSite Veteran
    Messages: 3,394

    Yeah any misfire I've ever had was a coil not a spark plug, and I've replaced hundreds.
  5. Milwaukee

    Milwaukee 2000 Club Member
    Messages: 2,180

    They notorious for misfire with bad coil pack. Rubber boot get crack and let spark jump to head instead spark plug.

    Check compression before spend all parts that never fixed issues you had now.
  6. Pinky Demon

    Pinky Demon PlowSite.com Addict
    from Ohio
    Messages: 1,121

    Also check for terminal tightness on the injector wiring plug in.
  7. erkoehler

    erkoehler PlowSite Veteran
    Messages: 3,279

    Ii had a coil bad on my v10, I'd start there.
  8. kmkalf

    kmkalf Junior Member
    Messages: 11

    sorry for the delay guys but it was a bad coil pack, thanks again