Replaced battery now car won't start - 1994 Buick LeSabre

Re;Replaced battery and starter car will crank, but won't start....
Did the engine crank & not start prior to replacing the battery ??

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You said that you replaced the battery so in either case of new or another battery have a load test done as what you describe indicates a failing cell in the battery or loose t/dirty terminals.

Are you saying it will not start, or will not crank ?

Do you have fuel pressure and spark to the plugs ?

Is there a check engine light on? Did car crank with old battery or you just replaced to see if would start?

We just went through this with our 2003 Rendevous. Clicking like crazy but wouldn't start. Replaced the starter but still doing the same thing. Our next step was going to be replace the battery (which tested well) and the ignition assembly. Out of frustration, I hit the top of the hood and the headlights came on!! Further investigaton proved that the problem was a corroded ground wire on the battery. Hope this helps

Could be several things that caused car won't start, inculding starter, ignition, dirty or loose battery connections.
Honda Diagnostic Tool

if it does not crank then you might need a starter, if it does crank the you have to check to see if you have fuel pressure

Try checking the battery and battery leads. Sounds as though you have a bad battery. Also check your fuses under the hood and dash.