cranks good but will not start
 

2001 s80 with 2.9 engine. car has been running with no problems. My wife left work and came home.(3.5 miles) with no problems. About 2 hours later I went to start the car and it just cranks ,does not even fire or mis fire. After many trys I killed battery. The gas tank was on "E". but code said 50 miles to empty. I went got 3 gallons of gas. And got a jump. After 2 or 3 trys of cranking the engine started I held the down a little 0n the gas pedal. and the engine was running at about 2000 rpms for 10 secounds. so I took my foot of the gas pedal and the engine died. Tryed to restarted but just cranked did not even fire a little.. any ideas,, thanks so much

Load test the battery. Sounds like a marginal battery.

I have had this problem in the past with my 850 but usually after several weeks of not being run but an interesting thing happened recently. I blew a head gasket and when I got the car towed back home I tried starting and it of course wouldn't. I took the spark plugs out and saw that 3 were just a tiny bit wet.
I looked in the cylinders and saw water in some of them. I used a hose to blow out the water [a messy job!] and that bad boy started right up.


Point here is, check the plugs and look in the cylinders.