Thanks I for the initial thoughts the old fuel pressure regulator is definitely headed to the trash can.
Extended scenario :
The wife took the kids to school and came home for a short period of time and then the "accident" happened on start up. At first I thought she might have exaggerated and backfire with a vacuum hose had popped off that smoked a bit. When I got home and saw the damage, I google to this site. I then asked her if the car had stuttered on startup - she did not remember anything major. (Did I mention this is a handmedown everyday driver with 171K miles? So it is not perfect.)
I will try to post the picture tonight. But it looks very similar to this photos here (but with only maybe half of the damage there and no water from the fire truck
I guess I was asking if the MAF sensor might have survived or if it is a surefire goner, etc - replace MAF with any sensor that fits. (The two pieces of the current MAP sensor suggest a loss there.)
I will either find the one I have or get another Haynes manual but I was wondering what additional jewels of info anybody could add.
I want to fix the car but I can't justify a huge repair bill for the car at this stage in its life.
Again, thanks for any advice.