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P0506 and P0357 code, need help

Old 04-24-2012
  #21  
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I have a 2003 f150 v8 5.4 supercrew. And it throw a code po357 ing coil g . I change all sparkplugs and cyc#7 and it still have a missfire. Anyone has any idea let me know.
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Old 04-24-2012
  #22  
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Originally Posted by blackf150 View Post
I am new this site. I have a black 2005 ford f150 on 20" wheels. The truck has a cold air kit and dual exchaust cat back system. I do not like to join a site and start off by asking for some help. I have the 5.4 engine and it is running like CRAP. I hooked my code reader to it and am getting codes P0506 and P0357. Can anybody help me with this. What does it mean by Igintion Coil G primary/secondy circuit. I just replaced all the coils and plugs about 2 months ago and the truck stays sitting all week. Any help would be great.:
I have the same problem. Mine is 2003 v8 5.4 I had change coil#g ,which is cyc#7 right and all sparkplugs. But is stll running like crap, any idea?
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Old 08-13-2012
  #23  
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spray some carb cleaner around the manifold, looking for a vacuum leak, idle will pick up if you find it.
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