20004 hyandai elantra , key fob was not working so i just used key .It set off alarm and i tried takin out fuse an other things.But Cant get it to start now.P.S. i looked in manual later and it said caution avoid trying to start engine while the system is armed,but ,too late i tried several times.now when i try it makes a mechanical fluttering noise.

I realise it's an obvious suggestion but have you tried a new battery in the key fob? You could also check the fuse controlling the door lock motors.

you can get the key to override alarm by just turning key to ON position and leave it that way for 1-3 minutes alarm will slow down and beep a few times then silent. turn key off wait 5 seconds then start engine

There is NO kill switch on the 2000 Elantra... HOWEVER, there is a thing called the Key Fob (keyless remote entry system). There is, however, a system in place called the 'starter kill' circuit and it is activated when the burglar alarm goes off.... it's called the burglar alarm relay and it is activated to prevent the engine starter system from being used. There are three ways to get the engine started in such a circumstance... 1. use the key fob to 'disarm' the system... 2. put the key in the ignition and turn it to the 'RUN" position and wait until the alarm stops (horn stops beeping and the parking lights stop flashing), then the engine will start.... 3. pull the starter relay from the UnderHood junction box and bypass the starter circuit (key in ignition and in the 'RUN' position), jumper the starter solenoid circuit to energize the solenoid to start cranking the engine -- it should start then.

you could pull one of battery terminals off for just a second that should stop the alarm from going off

Go to http://www.hmaservice.com/ and register (vehicle by VIN). Afterward, you'll have access to technical information (manuals, wiring diagrams, service bulletins, etc) about your vehicle.

change the battery's in the key fob

What year(s)?

scap it