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Alex
Alex, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1161
Experience:  ASE Certified Master Technician, L1 Advanced Level Specialist
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what are the symptoms of a bad coil pack

Customer Question

what are the symptoms of a bad coil pack
Submitted: 6 years ago.
Category: Chevy
Expert:  Alex replied 6 years ago.
Hello. A bad ignition coil can cause misfires, no starts, breaking up, and stalling.
Expert:  Alex replied 6 years ago.
If you would like to test your coil, you will need an ohmmeter. Here's how to do it:

graphic

IGNITION COIL TEST
  1. Disconnect the distributor lead and wiring from the ignition coil. CAUTION : Do not Insert the J 39200 probe into the ignition coil connectors. The female terminals could be spread and deformed, resulting In intermittent operation of the coil. Be sure to make contact with only the front edge of the terminals.
  2. Connect an ohmmeter as shown in Figure, step 1. Use the high scale. The reading should be infinite. If not, replace the coil.
  3. Connect the ohmmeter as shown in Figure, step 2. Use the low scale. The reading should be 0.2 - 0.5 ohms. If not, replace the coil.
  4. Connect the ohmmeter as shown in Figure, step 3. Use the high scale. The meter should read 5k - 25k ohms. If not, replace the coil.
  5. Reconnect the distributor lead and wiring to the coil.

 

 

Expert:  Alex replied 6 years ago.
Now that you have viewed the answer please click accept. If you would like to ask anymore questions, please feel free. Thank you.

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