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Sounds like a fuel supply problem. The fact that it does momentarily start, indicates its not an electrical issue. However, no steady fuel supply to the injectors and it won't run for more than a second or tow. Your problem is in the fuel delivery system most likely. Either the pump, or (if the unit is located in the fuel tank) the fuel filter may have ruptured. That would sent all the fuel back to the fuel tank not to the injectors.
Could be any of several things. If the crank sensor is marginal and not sending pulses, the fuel pump is shut off. This is for safety. The pump is energized for a few seconds as key is turned in preparation for starting then engine must rotate normally to keep the pump on. If it stops, in a few seconds the fuel is cut off.
sounds like a fuel pump failure,check the fuel line pressure with a gauge ,on the fuel delivery pipe where the injectors are their is a valve like a tyre valve ,you should read 55lbs here for it to work properly.
check or replace fuel filter for clogging up. if it does clog up, then you will not get enough fuel to engine to run it properly. it will stall at stops, and be very sluggish on takeoff. check fuel pressure if need be. could also be a bad catylist convertor. so check above first. Rent a fuel pressure
guage from advance or oreilley's and check fuel pressure if needed. they will tell you the proper fuel pressure for your car.
This could be from anything from a dirty fuel filter which is robbing engine of proper fuel supply, to dirty injectors, and possibly dirty air filter. Way to test this is to remove air filter, check for cleanliness. If it is clean, then move to the injector cleaning. You can by the additive at any auto supply store, on a full tank of fuel. Run the engine for a while and if this improves then it is likely the solution. However, a fuel filter would be highly recommended and are generally located under the hood near the rear of the engine compartment. Not too tough to change, but if it has never been, then it is likely it would improve fuel pressure to the injectors, increasing the idling slightly and smoother running performance.
You got a tank of bad gas. You need to drain the tank and refill with good gas. If that doesn't resolve issue you need to check fuel pressure to see if the fuel pump gave up on you.
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