dakotadog
New Member
Checked today. - 48.8 mpg, putzing around town, little highway driving....87 octane. 2006 (the faster red one).
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You should start a new thread but post your fuel map and lets see it. Perhaps the tuner got a bad read from their o2 sensor and made it super fat rich? Do the tail pipes ever clean up and what do the plugs look like? If the porcelain and electrode are black and sooty you may need a hotter plug to keep them clean so it doesn't foul them... CR10E come to mind. Gap under 0.028"...
Advancing the ignition will improve the fuel efficiency but may come at the cost of higher octane fuel.