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Old 09-22-2017, 09:03 AM   #34 (permalink)
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Originally Posted by AdrianD View Post
I never knew about the air-flow meter adjustment. Could be different between the 1.8 and 1.6 models.

A new O2 sensor would definitely help.
There are reports of people who turbo Miatas and get better mileage if they keep out of boost, as the stock tune could be leaned out.
You can't adjust the AFM on the 1.8 cars, only the 1.6.

Heated o2 definitely helps. Worth doing, considering how cheap iit is.

Typical gains on a aftermarket ECU wkth a completely stock engine are 10%, sometimes as high as 15%.

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