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 on 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 on April 06, 2011
try ignition coil
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I have a 2005 cobalt . parked it in the garage last night and went to start this mourning. It will turn over but wont start. It almost does but wont and I smell fuel.