Just changed my ECM last week and everything worked fine till today. Now I’m having to pump the throttle while I’m trying to start it in order to get it running and then once it’s running my ADC off light comes on along with the slip light and the service engine soon light. I disconnected the negative battery wire for about ten minutes and tried again and it started right up with no lights. Anyone else ever have this problem?

 

ECM is telling you what the problem is when it flashes the check engine light. Don't just unplug the battery to erase the code, get it on an OBD2 scanner so you know what the problem is.