engine cranks but wont start on 2005 Chevrolet Cobalt

I replaced the spark plugs,checked the fule lines and filters but still it won't start,could it be my timing chain or something eles?

by in Gallup, NM on May 13, 2010
2 answers
ANSWER by , May 13, 2010
i would hook it up to a scantool to see if you get any codes it could be a bad sensor cam or crankshaft sensors or a parking neutral switch also a security light issue which is related to programing
ANSWER by , April 06, 2011
try ignition coil