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Old 12-06-2017, 05:21 PM   #6 (permalink)
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HC of 49 state Civic VX too high

It looks like I'm having the same issue. All values are in range, except HC at 25 mph. Question: Will temporarily swapping in a CA ECU from eBay for the smog test likely resolve it? My understanding is that with the CA ECU, the car does not go into "lean burn", and thus behaves exactly like a Cali VX. Seems obvious, but I'm wondering why the previous posters did not go that easy route. Your thought are much appreciated.
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