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1. you should check that ecu code that you never checked.
2. unplug your o2 sensor, see if it still behaves the same. i had a similar problem once and it turned out to be a bad o2 sensor.
3. maybe set yoru timing back to base timing and perhaps if possible setup your bov to recirc.
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1993 KA24DE for sale with 180k..running when pulled.... need to get rid of ASAP...i'm moving
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