I've noticed a pair of wires that go to some kind of sensor on the fuel line. The sensor looks a bit like a coolant temp sensor, but it's not as it's on the fuel line and only has 2 wires.....Any ideas? It looks like someone has tried to pull it off and has ripped the wires out instead and then stuck them back in with duck tape!!!! It's located on the top of the engine, just next to the fuel filter. Any help is much appreciated, thanks!