Misfire Question...

Discussion in 'SN95 4.6L Mustang Tech' started by Blown Pony, Feb 2, 2014.

  1. I've been having a steady misfire on my car for about a month. (Some days worse then others) I couldn't get it to ever throw a code so just left it alone waiting for it to throw a code.

    Today the check engine light finally came on and my OBD tells me its cylinder 3. I went ahead and changed the coil and plug for that cylinder, reset the codes, and test drove it.
    It's still misfiring on #3...

    The injector sounds like it's working ( Used a metal rod to hear it knocking), but that's the only way I know to check it. If it's ticking, should I assume its working properly?

    What else would cause only one cylinder to misfire? Ideas?

    It's a bolt on 2001 GT BTW...
  2. Compression check will tell you if it's mechanical such as valves sticking.
  3. cop boot could be torn and allowing a short or mice could have chewed wires