Question about 1996 Ford Taurus

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I just purchased a 96 ford taurus with a 3.0 engine. It's misfiring. I replaced the plugs( autolites ) and gapped the at .044 ( according to autozone). I also replaced the wires, pcv, and air filter. It ran better but was still missing a little. I replaced the heater coil ( for heat) now it's missing again. I checked to see if I had knocked anything loose from under the hood. Everything looks ok. What advice would you give to locate this misfire i'm having? Thanks in advance

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  • Jeff Turcotte
    Jeff Turcotte Oct 12, 2010

    can you hear any sparks jumping? Check the routings of the wires to make sure thry aren't too close to the engine.

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  • Ford Master
  • 5,495 Answers

You can go to Autozone or Oreillys for a free scan. Usually the onboard computer will pickup an electrical problem. There may be something recorded that a scan will show.

If not, look for nonelectrical problems like Vacuum leaks. Take a water spray bottle and go around the Intake and Vacuum lines, a change in RPM would indicate a leak. You could have a dirty Injector which is firing Electrically, but clogged. Since each cylinder bank averages all 3 cylinders for RICH and LEAN errors, an Intermittent miss would not show as easily.

If you have the oldstyle Vacuum gauge, it would show fluctuations for problems in Valve action. Like a Valve not closing due to Carbon buildup, a weak Valve spring, a clogged Lifter, all things not electrical. So if the result indicates possible clogs, you can get Professional cleaning of the Injectors or try a gas additive. You may need a product such as an oil additive, like Lubegard to free the Lifters.

Thanks for using Fixya!

Posted on Oct 12, 2010

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