Just replaced spark plugs now car wont start? on 2004 Nissan Altima

I replaced the spark plugs and coils and my 2004 nissan altima 2.5 wont start, battery seems fine, it started before i replaced them, any ideas?

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1 answer
Did you check if the spark plugs have the proper gap ? take the plugs out and check for proper clearance make you not to drop the spark plugs when you put then back in the car.