Clive I have an oxy monitor on my dash and I can see the ECU going full rich much sooner and staying there during a aggressive driving and hard acceleration more fuel to make power not increased emissions but we will see I am driving to Maine this week 1 full tank of highway driving the 2.1 engine has larger intakes and in my case larger valves so I am moving allot more air threw the engine to begin with. The 1.9 ECU is definitely a economy fuel ecu in my van I have seen 21 mpg at 75 mph Bob |
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