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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

Plug gap??

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Old Jul 14, 2004 | 09:12 PM
  #1  
Marc150's Avatar
Marc150
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From: Canastota
Plug gap??

Ive seen two different gap specs, .44 and .56. Which is correct? I would think that the bigger one is right, more gap, better burn. I have a stock ignition. Which one should I go for and not have to worry about damaging anything.
 
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Old Jul 14, 2004 | 09:19 PM
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i never gap my spark plugs just take em out of the box and put em in
 
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Old Jul 14, 2004 | 09:31 PM
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Me too, all the plugs Ive bought have been pre gapped. I just put them in and they seem to work fine
 
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Old Jul 14, 2004 | 09:33 PM
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acerockola77
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From: WA
.044'' is the reccomended gap.
 
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Old Jul 15, 2004 | 12:58 AM
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drewcoolness99
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From: TEXAS!!!!!!!!!!!!
i tried that once with my mg and i had a girl over helping me. i didn't even think to gap them, i let her help me put them in, It turned out that was the reason i couldn't get it to start again. I always gap mine now. Only i don't think it would make as much of a difference in my truck.
 
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Old Jul 16, 2004 | 09:59 AM
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Pre-gapped .....Van
 
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Old Jul 16, 2004 | 10:35 AM
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From: Running Springs CA
Originally Posted by acerockola77
.044'' is the reccomended gap.
It depends upon the engine and/or model year. .052-.056 is the correct gap on my 1994 5.0. The decal under the hood is the bible, not a Chiltons manual, not Haynes, not the spark plug company catalog and not the guy at the autoparts counter.

The fact that the plug is pre-gapped to .044 does not make it right. I had problems with my 1974 E-100 because of a too-small gap, hard starting and failed emissions test.

Jim
 
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