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Discussion Starter · #1 ·
Hi everyone,

I've a 95' Primera P10 (European) with SR20DE engine and catalyst exhaust.
I try to understand how work the catalyst's conditioning when engin start?

Someone would know how ECU map works on those engine, and try to explain it to me ?
Is it a timer in minutes with an increasing of mixture richess ? or is it with a temperature sensor ? Or other ?

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