How do I test the coil pack on my 2003 ford f150 there's voltage to the coil pack but nothing coming out?

April Wilson

Asked by Jun 18, 2014 at 02:05 AM about the 2003 Ford F-150

Question type: Maintenance & Repair

2 Answers

James Ramond

volt ohm meter go to ohm and check resistance threw coil for continuity

Tracy Hooks

You can test continuity as 7limmy7 suggests but oftentimes, it'll show good and still won't put out enough spark. You should have constant power to the coil pack. The PCM trips a spark by suddenly shutting off power - the collapse of the magnetic field causes the spark. You could hook up a test light and see if the power is switching as you crank the motor. Otherwise, replace with a known good component and retest.

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