I have an 05 Honda accord that is having an issue starting. The ignition lock cylinder locked up so I took out the pins and it worked perfectly fine, besides the "zzzzz" sound that occurs occasionally when the key is turned. Here recently though, the car either makes that "zzzz" noise or doesn't turn over, if I turn the key and it doesn't turn over and I tap the starter motor it attempts to starts, but if I apply jumper cables and connect one end to my battery and the other to another car's battery, IT STARTS WITH NO ISSUE, but without jumping it off it gets weaker and weaker until it doesn't turnover. I took the battery to get charged but it did not turn over until I jiggled the ignition cylinder. If I jiggle the ignition cylinder back and forth it may or may not start. PLEASE HELP!

1,) Makes "zzzzz" during ignition turnover
2.) Starts up perfectly with a jump
3.) The car didn't start even after battery was fully charged
4.) May or may not start if the ignition cylinder is messed with
5.) Starter attempts to work if tapped during ignition's non-working state

 

welcome to the forum. should change the key ignition switch first, then check the starter solinoid or both swqwtarter and solinoid

 

If not turning over means no crank, no start
Sounds like a failing battery along with a failing starter.
Would have battery tested first under load.
If you replace the battery and the starter still has an issue then need to test the starter

The jiggling of the key sounds like coincidence (may or may not work)