2003 ford ranger - cylinder 4 misfire detected and misfire detected 1st 1000 rev

Discussion in 'Domestics' started by bberksonstock, Jun 14, 2007.

  1. bberksonstock

    bberksonstock Newbie

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    Can anyone recommend the repair I need to make to a 2003 Ford Ranger pickup truck based on the codes I received when I plugged in my OBDII code reader. I received 2 codes, P0304 - Cylinder 4 Misfire detected and P0316 - Misfire detected 1st 1000 revs. Im not sure what part needs to be checked or replaced.

    Thanks

    Brian
     
  2. Jim Fairbanks

    Jim Fairbanks wrench

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    When was the last time it was tuned up?.....possibly a bad plug or a plug wire...look for a loose or shorted plug wire....that would be the first things I would check....Jim
     
  3. bberksonstock

    bberksonstock Newbie

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    thank you for your reply Jim. I had the vehicle tuned-up and had replaced all the wires and plugs 2 months ago, the problem was there before and after the tune-up. Is there anything else you can recommend checking.

    Brian
     
  4. Jim Fairbanks

    Jim Fairbanks wrench

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    Which engine do you have in it?...A bad injector can also cause it to throw a miss code...How does it run?...Have you had the fuel pressure checked...also a bad crank sensor could cause it...Jim
     
  5. Transman

    Transman Receptionist & Complaint Dept.

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    Re: 2003 ford ranger - cylinder 4 misfire detected and misfire detected 1st 1000

    You might want to try a bottle of "Seafoam" in the tank or find a shop that does "Motorvac" service. The fact that is was there before the tune up kinda leans toward injector problems. Post back, Transman
     

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