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Old 04-19-2017, 01:07 AM   #103 (permalink)
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Originally Posted by kurzer View Post
make sure, the lambda sonde is ok first. a weak sonde tends to richer mixture in closed loop. the tune of the air flow meter is working for open loop.
What are you using to retune?

It's an interesting thing, the tuning of that motor. Friends with the Familia 1.6 of the same vintage (same engine, right? Just some hardware differences?) had the same economy issues back in the day. The engines were tuned way too conservatively, and on track days, the 1.6 guys were getting WORSE economy than I was with the Protege 2.0 engine!

Reportedly, Japanese Mazdaspeed ECUs run leaner... but still get terrible economy.
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