To be honest, I have never heard of an EGC either. Is it possible you mean EGR problem instead?
When you insert the key into the ignition and turn to on, does the security light come on and then go out? when you turn the key all the way over, does it make any noise at all, like a click, or just nothing?
I don't know if it is an EGR problem - All I know is what my research (mostly internet) pointed to something called an EGC for example (http://chryslersebringseo.com/key-1997-chrysler-sebring-egc-sensor.html and http://www.faqs.org/qa/qa-4643.html ) are leaded with references to it. So I guess I have been misinformed which is what brought me to justanswers.com.
When I turn the ignition to ON there is no security light- just oil, battery, abs, & temp. -all but ABS goes out after a few seconds. When I turn the key all the way over the engine turns over but does not start (pior to chaning the battery i didn't get that much)
Ok, I read those forums. I believe that the consumers are actually referring to the EGR(exhaust gas recirculation) valve or sensor, which if clogged with carbon deposits or the vacuum is not working in it, can cause performance issues.
But first, we need to concentrate on the no-start condition right now. If you have a can of starting fluid or even carb or throttle body cleaner, we need to see if you are missing fuel or spark.
spray some starting fluid/carb/throttle body cleaner into the throttle body and try to start. If it does start and run for a few seconds, you have spark but no fuel, most likely a failed fuel pump, which would explain the previous problems you were having.
If it doesnt start, then we are missing spark, and you will need a voltmeter to run a couple of tests to see where the spark is lost at.
do this and let me know the results so we can go from there