1998 Ford Expedition Logo
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Anonymous Posted on Jul 25, 2014

How to test a ignition coil

Is there a reliable way for a non-expert to test an ignition coil on a 1998 Ford 5.4 Triton engine

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David Montgomery

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  • Posted on Jul 26, 2014
David Montgomery
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Since that's a COP system, all you have to do is remove the suspect coil, reattach the wiring connector to it, and install a spark tester into it in place of a spark plug. Make sure the tester is properly grounded, and have someone crank the engine over. You should have a strong blue white spark at regular intervals while the engine is cranking, or running. If no spark, make sure you test for voltage at the harness connector, as well as ground, while cranking. If no voltage or ground at the connector, suspect a faulty wiring harness, module, or PCM.

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  • Posted on Jul 26, 2014
Edward Garrison
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There are two choices. One-take your vehicle to Advanced Auto or any other parts store and have them hook it up to their hand held tester that will tell you if anything is showing up as defective. If so, then you can replace them yourself. Second-Take it to the auto dealer and have them check it, but this way will cost you.

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5 Related Answers

A

Anonymous

  • Posted on Sep 14, 2008

SOURCE: Sparkplug ignition coils

not a coil problem. clean/replace your mass airflow sensor.. if YOU can.

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Anonymous

  • 82 Answers
  • Posted on Feb 23, 2009

SOURCE: 1995 ford f=150, engine turns over will not start.

it could be or try your crank sensor and wiring to the crank sensor known to go bad

Anonymous

  • 101 Answers
  • Posted on Mar 03, 2009

SOURCE: ignition has no spark in 1998 ford explorer

check for power at the coil wiring harness

Anonymous

  • 1 Answer
  • Posted on Mar 29, 2009

SOURCE: 1998 ford expedition blinking overdrive light

This blinking light indicates a problem. You will have to have it scanned for trouble codes to find out
what it is.

Anonymous

  • 3 Answers
  • Posted on Jan 01, 2010

SOURCE: ford f-150 ignition coil testing

get them from auto zone change them out one at a time . after each one start up and see if it makes a difference or not . you can always take them back.

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