So i got a gsr swap from a guy and swapped it in my 95 civic ex and I got a cel 43 (fuel supply system). i was told by a shop that it was just my o2. Checked o2 sensor and it was extended 2 ft and not soldered so I soldered the wire. Still getting the code. The o2 sensor is a denso 4 wire with 2 black, 1 white, and 1 green. If the 2 black are crossed would that make a problem? Any other ideas of what my problem could be please let me know. This code is starting to **** me off. I only get around 150 miles on a full tank. If there is a write up about this please point me in the direction I have searched and could not find anything. Thanks to whom ever helps me out.

 

i do know if the black wires are crossed, you will get what you describe. what ECU do you have, and it's a B18C1, right?