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Discussion Starter · #1 ·
I plan on replacing my current spark plugs with Bosch after installing JB4. I am wondering if it is necessary or recommended to change the ignition coils as well.
 

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You can but not necessary unless you experience hesitations (misfires) after you do. You'll know right away and usually it's just one of the coils.
 

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Discussion Starter · #3 ·
Thank you for your reply. Hopefully I wont need to and I can save $$$
 

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I bought a couple lifetime replacement coils from Autozone and so far so good. They also look better built than the Bosch coils but who really knows?
 

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