Originally Posted by afstud6900
OK, so I have a 97 Taurus with 114,000 miles but I had a newer engine put in and the engine has 70 ish thousand miles on it. I've had this occur twice in the 2 months I've had my car back.....when I'm driving it and come to a stop it will die..and I put in park and start it up and it'll be fine. Now I've only had this happen twice....and its really rare...but I'd like to know what caused it to do this. But its not over heating I know that ...but I'm not concerned about it just wanted to know. But otherwise, my Taurus is a great car.. but the other thing is ..if I get the rear struts replaced will it raise the back end up a little higher ?
Probably need to remove and clean the throttle body and IAC valve. Gunk builds up in the IAC passages and the TB bore and affects the idle. The PCM usually self adjusts or adapts for this, but when the battery is disconnected, all the adaptives are cleared, then the PCM has to re-learn everything, and IAC parameters are the slowest to adapt, especially with a dirty TB. This is the most logical thing that I think happened, since your engine was swapped, and the battery is removed for space.
As far as the struts, RickMN is right. Struts (Shock absorbers) are only to dampen spring oscillations. Without shocks, the car would continuously just bounce up and down. New springs will only marginally improve rear ride height. These vehicles sit a little low in the back by design.