I would bet that your problem stems from the disconnected O2's. First, did the car run correctly before you put in the long tubes? If so, I am all most certain it is the disconnected O2s. In your first post, you mentioned that the car ran fine cold until it warmed up. Here's how I think why, at around 160F the EEC gives the O2's air/fuel ratio control for the engine. I believe the car ran ok before the rain incendent is because the EEC uses an adaptive fuel mapping logic, it watches for variations in the O2 sensor signal. If the EEC senses that the O2 singal tends to bias toward a lean or rich condtion the EEC will try to compensate for a better 14.0:1 ratio. Which might explain why the car still ran because the computer tried to keep the fuel ratio close until it could no longer compensate or until it recieved a new crazy singal from your water shorted O2 connector plugs. Futhermore, the EEC is constantly monitoring the input/output signals to the computer looking for variations, and when it finds one, it will assign a code to it based on the findings/variations from the norm and store it in memory until you pull them out. And as for your last entry you mentioned the the car is staring to run a little better, that is because the computer is adapting to the new conditions as best it can. My suggestion is to either get new O2's with 16'' leads or buy the extensions for your exsiting O2's but if they are the originals it might be a good idea to replace them. Sorry for such a long post.. but I too have a highly modified stang and have been wrestling with the surging idle FOREVER until I finally sat down and learned how the whole system works. Now she purrs like a kitten. Ok I'm done now.
