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i just got a new ecu and they deleted my 02 sensors. does this mean my car is dumping max fuel at all times. it runs awesome when i mash the gas but seems to get less fuel milage now. should i have them add the last 02 since my cat is gone so my car can still get fuel readings

ok so here is my set up. I have a 97 honda civic with a h22 out of a 01 prelude i got from my friend. the car ran fine for the past 3 weeks. it had a p72 0bd2 computer the car ran great with it just lagged and hesitated. well today i drove it 70 miles round trip highway and city traffic to pick...