1996 buick century v6 3.1L all of sudden not wanting to start but after a couple mins of turning key to start, finally starts and then runs great. now problem only occuring at starting of vehicle. once started, runs great.

I would check for a vacuum leak or a plugged up catalytic converter. It could be a number of things, but that is a start. If it feels like the transmission is dragging the engine down it could be your lock up converter in the transmission.

In this year the most common reason is a defective crankshaft position sensor, but you really need the OBD2 engine control fault codes read to confirm this fault is present. This OBD2 fault code test can be run for free by any Autozone or other chain auto parts store.

The security light is probably on because of the key tumbler sensor where the ignition switch is at is bad or corroded. The security light on while your able to start it means the anti theft system is disabled and it will start every time. If you want you can replace the sensor on the tumbler for under $100 on your own or run to a junk yard to grab a replacement sensor.

THERE IS A CHIP IN THE KEY I BELIEVE. THERE IS A RELEARN PROCEDURE YOU CAN TRY IF WHEN YOU TRY AND START IT THE SECURITY LIGHT FLASHES. HOOK UP A BATTERY CHARGER. TURN THE KEY ON AND TRY AND START THE CAR AND RELEASE . DO NOT TURN KEY OFF LEAVE IT IN THE RUN POSITION. AFTER 10 MINS THE LIGHT WILL STOP FLASHING. TURN KEY OFF. TRY AND RESTART CAR AND AGAIN DO NOT TURN KEY OFF LEAVE IN THE RUN POSITION. LET SET 10 MINS AGAIN. LIGHT WILL STOP FLASHING AFTER THAT 10 MINS. DO IT AGAIN FOR THE 3RD TIME. SHUT KEY OFF LET SET 5 SECONDS AND START THE VEHICLE. HOPE THIS HELPS

sounds to be the starter going bad

Check a few things, check your spark plugs, spark plug wires, also check your fuel filter, fuel pump, but the first thing that you should check is the ground wire from your battery to the engine block

I would have the ignition switch checked, and replaced if that is the problem.

Take the original key, if you have it. Start the car, kill the car then start it with the new key. This will work for adding a key. If you are replacing a lost key then you will have to learn it to the theft system.Place the key in the ignition, turn it to run for 10 min. Cycle it off then back to run for 10 min. Cycle it off then back to run for 10 moer minutes. When the 30 minutes is up turn it off then try to start it. Thai should work. I have had to do it more than once. Good Luck

Need to check for fault codes. Possibly a faulty sensor causing the fuel system to run rich or lean.

will tace abaut 10 min to fix problem,sit on dreiver seat and turn key on only dont cranc ower weit 10 min or litlbrt more ,securiti leigth will strt flushing imidietly turn key off and start engine if dont work repit prosigure dhis will reset antyteft sistem in car