Car started and ran fine. Sat for 3 weeks. Now will crank but not start.

What is your question?

Someone suggested the lines are dry and try turning key on for 5 seconds 3-5 times. Don’t know if that is a valid observation but tried it. Didn’t work. Would parts fail just sitting for three weeks? Never had any problems or noises before sitting for the 3 weeks.

What makes this problem better or worse?

Nothing better or worse.

How long has your 2002 Pontiac Sunfire had this problem?

It sat for 3 weeks and tried to start 3 days ago. It does have gas.