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Old Dec 20, 2007 | 01:58 PM
  #1  
cj's Avatar
cj
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Joined: Dec 2007
Posts: 1
Default misfiring

03 ranger misfiring.....changed fuel filter and sparkplug wires. do i have to take to a ford dealer to get accurate diagnostic test?
 
Old Dec 20, 2007 | 05:34 PM
  #2  
BRETM's Avatar
Joined: Nov 2007
Posts: 257
From:
Default RE: misfiring

What do the spark plugs look like? Did you replace those too? What size engine?
 
Old Dec 21, 2007 | 07:31 PM
  #3  
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Joined: Dec 2007
Posts: 130
From:
Default RE: misfiring

Have you checked codes? How many miles on the truck? If over 100K you should change the plugs.
 
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