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Ignition coils

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Old Jul 6, 2004 | 08:54 AM
  #1  
jlud35's Avatar
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Ignition coils

Could anyone direct me to where i might find the correct amount of ohms i should be reading from my ignition coils to test if there bad, couldn't find an exact # through the faq's. 2nd cylinder missing knock sensor already determined to be bad got like, 200k ohms from that, no idea about the coils tho
Old Jul 6, 2004 | 09:00 AM
  #2  
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To Test Ignition Coils:
With the ignition off, disconnect the electrical connector from the ignition coil. Connect the positive (+) probe of an ohmmeter to terminal no. 1 and the negative (-) probe to terminal no. 2 of the coil connector - the meter should indicate infinite resistance. Reverse the meter leads ( negative probe to terminal no. 1 and positive probe to terminal no.2) - the continuity should be indicated, but not zero ohms. If the results are not as specified, replace the coil.
Connect an ohmmeter between the secondary terminal ( the one that the spark plug connects to) and terminal no. 1 - the meter should indicate infinite resistance. If not, replace the coil.
Note - Ohm meter to test coils is not the most reliable way. Some peoples’ coils tested perfectly, but they still misfired.
Old Jul 6, 2004 | 09:45 AM
  #3  
jlud35's Avatar
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Thanks, the coil tested fine but I'm gonna go pick a new one up and replace it, that combined with the new knock sensor should fix the problem, Its fairly obvious the car is not running right. Its running especially rough and gas mileage has slipped by about 5mpg. If the new coil and sensor don't fix it i'll have to go to a dealership. Thanks
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