Dandy news. The Engine Computer loses its mind when the battery is disconnected and has to relearn minimum throttle. To do that, drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the brake or gas pedals. The high manifold vacuum for that long is the signal for the computer to memorize the voltage from the throttle position sensor. From then on, whenever it sees the same voltage, it will know your foot is off the gas pedal and it has to be in control of idle speed.
Sorry for the delay in replying. My Verizon e-mail system keeps going down, often for a day at a time. Without e-mail, I can't get the automated messages that direct me to your last reply.
Wednesday, June 16th, 2010 AT 5:08 AM