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If it was remapped and still returning poor fuel economy disconnect the o2 sensor and see how it goes for a tank.

If tuned correctly you should see next to no difference in fuel economy with the o2 sensor connected and disconnected.

For what its worth my o2 sensor is currently disabled yet still returning good economy. :worship:

cool, i'll try that when i fill up next... ok now a noob question (puts on flame retardant suit) im not very familiar with RB series motors, having come from toyota 7M's (shudder) and 1J's. how far down the zorst is the O2 sensor on an RB20 DET?

What is with the second hand car market??? will it ever improve? i mean not everyone has houses and the like, where are the disposable incomes that spend money on just buying a car like we all did???? is it the fear of a stolen skyline that are putting people off? Defects.... because they have seemed to slow down lately.... money? I just dont understand....

Anyone???

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