I have been throught almost everything. Car still runs very rich with the blue coolant sensor pluged in (replaced plug with new). Runs ok with it unpluged for awhile. I just remembered that I had a bad plug to this blue sensor and spliced in a extra fuel injector plug that I had laying around. I have about 2 inches of the injector plugs original wiring and then spliced to the other wires....anyway I noticed that the two wire sizes are different, will this make a huge difference in resistance....say enough to make it run like crap?