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Q: Sometimes I have to jitter the key after I turn it all the way or the car will keep cranking or die just to get it started

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Especially in the morning or just starting it during errands,etc.my car won't start right. She will crank but won't turn over unless I jitter the key or let her die so I can start her over again-in which case she starts right up. I have been to the dealership and a dependable automotive shop many times with this problem. They all tell me the starter and alternator are good. I have replaced the battery, spark plugs, fuel pump, fuel filter, etc. The ignition hasn't been replaced-could it be this? What actually is wrong? -Baffled in Poughkeepsie,NY

My car has 84610 miles.
My car has an automatic transmission.

A worn ignition switch assembly is the most likely cause. A heavy keychain may be putting excess strain on internal components, causing the ignition switch to wear out prematurely. A certified technician, like one from YourMechnic, will be able to diagnose your starting issue and give you a quote for repairs.

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