2002 ford explorer not getting a spark after tune up. on 2002 Ford Explorer

I was told that it may be security system. Is this something I can fix or do I need to bring to dealer?

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2 answers
make sure the coil is properly connected

Roy
WAS IT RUNNING BEFOR THIS "TUNE UP"? WHO DID THE WORK? IF NO SPARK IMMEDIATELY AFTER WORK GO OVER EVERYTHING AGAIN TO SEE WHAT IS UNHOOKED.