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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Plugs gapped at .063!!

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Old Dec 9, 2003 | 08:36 AM
  #1  
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Digger1
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From: Kirksville USA
Plugs gapped at .063!!

I just bought a 95 F-150 XLT Extended cab 4x4. We took it for its maiden voyage this past weekend, about 330 miles and I used over 25 gallons of gas! The truck has the 5.0 engine and just rolled 100k. I knew it should get around 15-16 on the highway, but it was barely getting 13. I gave the engine a closer look and noticed that the plug wires were date coded 1995. I pulled the #8 plug and found the electrode was rounded and measured a .063 gap!
So anyway, I have replaced plugs(Autolites), wires(9mm Ford Racing wires I had laying around), cap, rotor and o2 sensor(Bosch) and can tell a difference in performance.
I can't believe the truck ran as good as it did.
I guess Built Ford Tough really means something.
 
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Old Dec 9, 2003 | 09:04 AM
  #2  
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95BlackF150
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i doubt they were gapped that way i would say that wear made the gap that big. nobody bothered to regap the plugs is all
 
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Old Dec 9, 2003 | 09:29 AM
  #3  
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Digger1
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From: Kirksville USA
Right- I don't think that anyone actually did this on purpose.
I am convinced that these are the original plugs and they have wore that much.
 
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Old Dec 9, 2003 | 11:13 AM
  #4  
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gatesj
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From: Remsen, NY
Gotta love the superhot electronic ignition systems.
 
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Old Dec 9, 2003 | 11:52 AM
  #5  
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Changed mine two weeks ago. At 80K the origional spark plugs were worn to .075 to .083 gap. The idle was smoother after I replaced them.
 
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