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The modules are sensitive to heat so they can cause the engine to shut off, then, after cooling down, the car will start and run like nothing happened.As it gets worse,it will happen more often until the car fails to start.

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18y ago
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17y ago

Remove it and test it. A good service manual for your car should tell you what to look for. If you don't have an ohm meter to test it, remove the coil and take it to a reputable auto parts retailer in your area.

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11y ago

You can do it yourself by going to troubleshootmyvehicle.com(the author is correct) or take it to oreilly auto parts or autozone. They both will test it for you...Take it to both places..a second opinion never hurts...good luck....

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13y ago

depends on type of vehicle. on a c.o.p. system(coil on plug)...the check eng. lite usually will come on to tell u which cylinder it is or random misfire. code 301 is cyl. #1 and 302 is cyl#2 on so on. random misfire is hard to pin point, i use a scanner. pep boys and like only read codes and not data stream(live activity)so unless you want to replace all coils then need to bite the bullet and take it to us(cert. automotive tech.)

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9y ago

It is important to recognize the signs of car parts going bad. The symptoms of an ignition coil going bad are bad fuel economy, backfiring, starting problems and engine misfiring.

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