Ford F-150 Forum Discuss the Ford F-150 here.

#7 cylinder not firing

  #1  
Old 02-09-2008, 05:38 PM
Thread Starter
Join Date: Feb 2008
Posts: 3
Default #7 cylinder not firing

I just changed the plugs in my 04 f150(change them early they are a pure nightmare) and now my #7 is not firing. I have 115 psi compression, I have spark and I have fuel.?????????????Any suggestions
Dave
 
  #2  
Old 02-16-2008, 07:24 AM
Join Date: Feb 2008
Location:
Posts: 41
Default RE: #7 cylinder not firing

Check the wires. Just because you have spark doesn't mean the spark plug is 'fine'. It could be a faulty Spark Plug.
 
  #3  
Old 02-16-2008, 08:39 AM
Senior Member
Join Date: Feb 2007
Location:
Posts: 2,167
Default RE: #7 cylinder not firing

yes,i'd try to swap that plug with another hole and see if 7 fires
 
  #4  
Old 02-17-2008, 09:49 AM
Thread Starter
Join Date: Feb 2008
Posts: 3
Default RE: #7 cylinder not firing

that was it. I had 2 bad plugs.you wouldn't think I would have 2 brand new plugs bad but I did. Thanks for the input.
 
  #5  
Old 02-17-2008, 09:51 AM
Thread Starter
Join Date: Feb 2008
Posts: 3
Default RE: #7 cylinder not firing

I went and changed the rest of the plugs with motorcraft instead of the autolight and now I have a hesitation. Its not a skip but under a load it seems like its holding back and it kind of surges.?????
Thanks for the help
 
  #6  
Old 02-17-2008, 03:33 PM
Join Date: Feb 2008
Location:
Posts: 41
Default RE: #7 cylinder not firing

Sounds like a gas problem to me...Need more info.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
flipsideafter
Chevy Silverado/ GMC Sierra Forum
15
08-22-2013 09:08 PM
tattooman
Report Concerns, Make Suggestions, & Get Help Using The Forum
2
10-19-2010 01:18 PM
tattooman
General Motors Tech
0
10-19-2010 11:55 AM
Nitro212519
Chevy Silverado/ GMC Sierra Forum
3
07-18-2008 07:40 PM
discoinferno65
Toyota Tundra
1
10-12-2006 04:52 AM


Thread Tools
Search this Thread
Quick Reply: #7 cylinder not firing


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.