Quote:
Originally Posted by Sileighty_85
cuz the Black top ECU pin outs are little bit differnt
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Incorrect, unless you're talking about the late model (Kouki) blacktop SR (or possibly the S14 blacktop as well). ECUs from earlier S13 blacktops (94-96) can be used with S13 redtop harnesses without issue. It's the 97-98 S13 blacktop type X ECU that requires a 97-98 wiring harness because of the different pinout.
Also, I've received conflicting information on whether or not a fat O2 sensor will work properly with a redtop ECU. Most people say that it'll work fine, still others say that it won't. It will definitely
work, but I can't say for certain that it will work quite as
well (meaning, your gas mileage may suffer etc) as a skinny sensor.
I just installed a new skinny sensor to run on my redtop ECU, Bosch part #13791 for an 86 NA 300ZX; I'll try to remember to let you know how it works out =P
Also, if you end up buying a new skinny sensor, do NOT just order one for an '87 300ZX turbo as it says in the FAQ. At least not if it's a Bosch. You'll end up with a square plug instead of a flat one, which could work...if you feel like cutting the plug off and soldering the wires yourself.