Just did swap and runs fine but throws code 43 during warmup. I clear the code and when I start driving after 40 mph, throws code 1. Some kind of fuel system problem. Did all the fuel checks, vacume leak checks, replaced 02 sensor and still cannot get rid of code. One question in my mind is this extra sensor by oil filter on the ls block. I asked around and people say its the knock sensor. On the stock LS harness the wires are WHITE/GREEN and BLACK. I looked in 3 manuals and i cannot find this sensor and it seems knock sensors came in from 92 up the wire is RED/BLUE. Just wondering if anyone knows what this sensor is and where the WHITE/GREEN wire hooks up to. If to the ECU what pin. Any help or suggestions?