Astro ECM Problem?

What code do you get from the reader?

Does the fuel pump cycle?

Is there fuel pressure?

Is there spark?

Are there any connectors near the battery terminals that might have popped loose?

Disconnect the battery and don't do anything to try and "maintain" any other vehicle memory devices. Just let the power go away. Leave it for a few minutes.

I'm willing to bet that a voltage dip or sag occurred when you disconnected the battery and whatever was plugged into the cigarette lighter socket took over. This could throw the ECM into a confused state.

William

just read your service manual,, lock the doors then open the drivers door with your key,,wow,,it will start

I disconnected the smaller battery cables to make sure they were OK and after reconnecting them, it was fine. The positive side connected directly to the underhood fuse panel that contains the ECM fuses so, I guess interrupting power to them was correct. Thanks, all.