Have a code of PO303 Cyl3 misfire F150XL 2007. Have a few ideals but could use any suggestions.

 

A little more info would help. Which engine is this?

 

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-REFERENCE-
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Regarding misfire - Possible causes:

• faulty/fouled plug.
• faulty/failing COP and/or connector.
• fuel injector.
• loss of compression in cylinder.
  etc., etc., etc..

 

What are your Ideas ?

 

This is a 4.2 L V6 for FordF150XL 2007. Thanks.