I replaced the battery about 2 weeks and have now noticed that the battery posts are fitting very loose. Went to get into the car yesterday and it won't start. Its turning over but won't fire. Took the starter off yesterday and had Autozone test, so that's not the issue. Could it be that the battery even though its brand new? I've tighted up the connection on the posts as much as can be.

 

Disconnect the battery clamps completely, negative then positive. Clean the battery posts completely. You can use Coke (yes the soft drink) or baking soda and water mixture. Clean the battery clamps completely.

Reconnect the clamps, positive then negative, making sure each is seated firmly and securely. If you can't get them locked down clean and tight, then replace the clamps.


A poor connection at the battery can cause charging problems, starting problems, electrical problems, etc....

It is possible that you flooded the engine at this point trying to start, so you might want to dig into how to deflood (owners manual plus several variations in the DIY section on here)