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2000 grand chorekee ignition key light flashes jeep start but will not run just shut down?

There are a few potential causes for this issue:

1. Low battery: Check the battery voltage. If it's below 12 volts, it may not have enough power to start the engine. Try jump-starting the vehicle and see if that resolves the issue.

2. Bad ignition switch: The ignition switch is responsible for sending power to the starter motor. If it's faulty, it may not be able to provide enough power to start the engine. Try turning the key back and forth a few times and see if that makes a difference.

3. Faulty starter motor: The starter motor is responsible for cranking the engine. If it's faulty, it may not be able to engage the flywheel and start the engine. Try tapping the starter motor with a hammer and see if that makes a difference.

4. Bad fuel pump: The fuel pump is responsible for delivering fuel to the engine. If it's faulty, it may not be able to provide enough fuel to start the engine. Try turning the key to the "On" position and listening for the fuel pump to run. If you don't hear it, it may be faulty.

5. Clogged fuel filter: The fuel filter is responsible for removing impurities from the fuel. If it's clogged, it may not be able to allow enough fuel to flow to the engine. Try replacing the fuel filter and see if that resolves the issue.

6. Bad spark plugs or wires: The spark plugs and wires are responsible for igniting the fuel in the engine. If they're faulty, they may not be able to create a spark and start the engine. Try replacing the spark plugs and wires and see if that resolves the issue.