88 760 turbo won't start...

[Vermontagon]

Actually it's intermittent.
I purchased my 88 760 Turbo gle wagon (510k MI) about 6 weeks ago from a friend who used it as a daily driver. my understanding is that it never gave him a problem, you could reach through the window a turn the key.
Within the first week of owning it I hit some black ice in a corner and then a telephone pole, deploying the airbag. I continue to use this as my D D saving up for the repairs.
About 2 weeks ago my boost indicator stopped functioing and stays in the middle.
3 days ago (X-mas eve) I was shopping and after about a hour went out to the lot to leave. the car cranked, caught, then coughed and stalled. repeated cranking never got a cough. thinking I might be out of gas (preexisting broken gauge & close to trip limit) I bought some starting fluid. The car started strong but was followed immediately by low RPM sputtering then stalled. I figured that indicated no gas so I put 2 gal in, more starting fluid and cranked. after some low R bucking, she caught and ran fine.
X-mas day, I thought it was behind me, but it happened again. getting out I accidentally left the key in the run positition and went back into brunch. 20 min later I cranked it and it started right up without needing ether.
After 2 problem free days, tonight after about 10 min of running I stopped and shopped for 20 min and it wouldn't start! By my trip meter, I should have 1/2 a tank.
I live in New England, but it wasn't that cold tonight, above freezing.

Any suggestion appreciated, Thanks.