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cat questions.

Originally Posted by SouthArk370Z Backfiring is usually the result of a very rich A/F ratio and the ECM has to be tuned to cause the overly rich condition, which overloads

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Old 04-11-2021, 08:13 PM   #8 (permalink)
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Originally Posted by SouthArk370Z View Post
Backfiring is usually the result of a very rich A/F ratio and the ECM has to be tuned to cause the overly rich condition, which overloads the cat, which allows raw fuel to pass to the tips, where it ignites. The exhaust system doesn't cause backfiring unless you remove the cats.

For a "regular", non-backfiring 370Z, a tune is not required if you make only exhaust mods or only intake mods - the ECM will adapt. If you make both I & E mods, you need to get a tune.
Awesome! thanks for that info. I feel alot better about the purchase now. My knowledge in this field is limited for sure.
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