99 Cadillac sts car problem?

cadillac
sts

#1

I left the key to the on postion for 2 hours and since then it idles ruff and in gear really ruff any suggestions?


#2

Was the engine running?
Did the battery go dead?


#3

Did you need jump start to get it going? Does it start OK now? Is there a yellow “check engine light on”?

You may have reset the engine computer by removing its power trying to start the car with a dead battery. The engine will run a bit rough until the computer “learns” the engine again. 50-100 miles should be plenty unless there is a check engine light, then you have a problem that a mechanic will need to address.