Went from bp05 ecu to bp26 with a vj20 turbo setup in my escort gt threw in a Y code vaf, knock sensor all that good stuff. But I've wondered if my oxygen sensor is reading proper if I'm still using the oxygen sensor from when I had bp05 ecu before I went turbo. What oxygen sensor would I need if I haven't gone wide band? Quite sure I run rich as hell.
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