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misfire #5 question

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Old Nov 8, 2009 | 09:00 PM
  #1  
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donaldm
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misfire #5 question

I have a 2005 f150 5.4 45,000 miles with an intermitent misfire on #5 (more sever under load) at 45k mile I wouldn't expect to need plugs or wires. Is there a common problem with the 5.4 on cylinder 5?
 
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Old Nov 8, 2009 | 09:13 PM
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bridge
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Watch out for your Cats man...you might have a stuck injector. If you're getting a misfire and hesitation (and can really hear popping) under load there's trouble abrewin'. Get to a dealer and pull some codes. Your cats are covered up to 80K miles.
 
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Old Nov 9, 2009 | 01:55 AM
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Probably just a coil. Week coil's get worse under load and higher rpm's. Switch your #5 and #6 coil and see if the miss goes to 6.
 
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Old Nov 9, 2009 | 08:57 AM
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good idea ill try it thanks
 
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