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There's been lots of people talking about getting really bad fuel econemy me being one of them for me I knew it had to be my O2 sensor coz it was stuffed all the wires were melted. I'm not saying this is the same problem that everyone with bad fuel ecomemy has but i'll get to the point when i went to nissan they wanted $230 for an O2 sensor (RB20det) so I went looking and found this guy on ebay enginesensorsandsystems they were only $50 (universal) I was a bit worried about putting a universal one in my car but the price was right so i gave it a go, now the car runs perfect no ruff idle better fuel ecomony.

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02 sensor wont affect idle. it is probably better to go for a genuine one vs a aftermarket no brander one as the voltage scale may be slightly out so it could affect say 5% fuel economy. a bog stock OEM one for the rb20 from repco should be no more than $90 for the correct one with the right plug.

R33 users can use the EL falcon one, althought there has been some specualation over it. I think the genuine one is only an extra $30 or so.

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my idle is great, nice even rumble, like a even purrr @ .9k rpm, just get 200k's to a tank no matter what I do, whether i weld the throttle open or drive like miss daizy.

wiped the bottom section of the exhuast tip and see shiney chrome, drive it for about 20 mins, pop quater of a tank and she's black. visibly black smoke @ top end 6-7k rpms, but thought this normal considering its a nissan especially a line, getting rich up top always beter an leaning out anyway so when i bought it was fine, just hadnt noticed the monster thirst till i owned the damed thing....

have been wondering if its out of the norm but aparently the car is supposed to pull 400k's to a tank when flogging it. 97 S2 so hell dunno. on bp ultimate, first owner in aus, maybe its the ecu defualting to safe map? i've runn injector cleaner through it, gona reset the ecu in the hopes it will get better, just need to find a guy who can test it in my local area for a decent price.

I dont want cheap work but i cant afford big $$$ either at the mo

anyone around the ec area with a diagnostic machine that wont charge me a fortune to hook it up and give it a test?

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