My check engine light comes on and the engine begins misfiring. Scan shows #3 misfire change spark plugs still has misfire any tips ?
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1999 Oldsmobile Alero Question: cylinder #3 misfire
Bret Bodas February 25, 2010, 16:33Master
Here is a ton of useful info about misfiring #3 cylinder (P0303 Code) http://repairpal.com/OBD-II-Code-P0303
ReplyVisitor, June 25, 2010, 18:57
Answer #2Visitor, August 23, 2010, 18:14
i have a 2000 alero with a 3.4 engine i had the same problem.
i changed my coil pack leading to cyl. 3 problem solved
ReplypacALERO, April 05, 2014, 00:37Rookie
did replacing the coil pack fix the problem