Boys and Girls: I just got off the phone with Troy at Liberty. The Alarm is from fire alarm sensors in the engine compartment. They obviouly got wet while washing in the engine compartment. Fire makes them loud - water makes the alarm barely audible. When the sensors dry out, the alarm will stop. When I went to bed last nite it was still going off, after fast idle for 25 minutes, .
It was quiet this am
Hopefully this info will save someone else some grief.