Could have started to seize, you need to have someone (or yourself?) Pull the spark plugs and see how it spins, then perform a compression test to check the Pistons, rings and cylinders. If it doesn't spin any better and/or the top end checks out, then I would suggest that you start pulling bearings from the crank and rods. Delayed oil changes and cheap oil filters lead to bearing problems.
Check the electrical circuit
Starter Voltage Drop
SOURCE: Car wont start. Error on all dashboard systems. lights/doors work.
its the ecm unit i had the exact same thing happen
SOURCE: gas gauge stuck under tab
I had the same problem. I carefully removed the dash panel around the dash board (it just snaps out), undid the dash board mounting screws, took out the dash board assembly, disconnected it, removed the plastic lens, and gently turned back the needle. To make sure it didn't happen again I drilled a tiny hole opposite the little post already there (next to the full side) and screwed a tiny screw into it. I then put it all back together and it has worked ever since. While I had it a part I also put a tiny screw on the temperature gauge side so it wouldn't have the same problem. Good luck.
SOURCE: Car won't start after loud grinding noise
had the car been running rough before hand?
It may well be a snapped con rod. Would allow the engine to turn for a while until it jams by the crankshaft.
If the car is manual it may be the clutch plate but with your foot on the clutch it shouldnt stop it.
SOURCE: car turns over, but won't start
Too many choice.
3 main areas are fuel, spark, air.
Try a shot of ether, if it fires at all, it is a fuel problem.
Then we can get into more detail.
SOURCE: 1993 buick lesabre won't crank. battery is good
most likelt the electrical ignition switch located on the transmission is shot
Just take a volt meter to see if power gets to the solenoid wire. If not replace that switch
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