Spark plug gapping? - Mustang Evolution

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Old 09-06-2012, 08:21 PM   #1
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Spark plug gapping?

Ok boys for some reason I searched it and got nothin... And I can't find it in this book of mine, so I pulled one out and checked it, and it was gaped @40 one one gap tool but 42 on another should I go with the gap on old plug? I mean I still runs happy at the gap they are of 40-42???
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Old 09-06-2012, 08:52 PM   #2
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What year is your stang?
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Old 09-06-2012, 08:58 PM   #3
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I looked in your profile pics. Looks like you have a 2000 GT. This chart is from my chiltons book...

Attachment 67471

The bottom row here shows .054 gap for the plugs.
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Old 09-06-2012, 09:03 PM   #4
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it will run fine with the smaller gap. but you will get a much better spark at the manufacturers recomendations. the only reason you would want to run .040 or under would be forced induction. but + or - .002 is fine also.
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Old 09-06-2012, 09:37 PM   #5
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Originally Posted by dreamstang
it will run fine with the smaller gap. but you will get a much better spark at the manufacturers recomendations. the only reason you would want to run .040 or under would be forced induction. but + or - .002 is fine also.
Well crap I pulled Em out and every one I pulled was @40-42 so far so that's what I've been stickin back in there...
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Old 09-06-2012, 09:42 PM   #6
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some people have a bad habbit of not checking plug gaps when installing new plugs. certain plugs work for many makes and models but some of those use different plug gaps. so alot of times the plug will not have the right gap per vehicle. so plugs gaps should always be checked. also there is usually a sticker under the hood somewhere that says the gap. even though azure already confirmed the proper one. just for future reference.
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Old 09-06-2012, 09:45 PM   #7
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Well crap I pulled Em out and every one I pulled was @40-42 so far so that's what I've been stickin back in there...
Should I ditch the hays and get what you got... I don't believe I found that chart in my hays manual...

---------- Post added at 09:44 PM ---------- Previous post was at 09:43 PM ----------

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Should I ditch the hays and get what you got... I don't believe I found that chart in my hays manual...
Oh I mean Haynes...

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Originally Posted by Mathew r Wright

Should I ditch the hays and get what you got... I don't believe I found that chart in my hays manual...

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Oh I mean Haynes...
Thanks guys...
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Old 09-06-2012, 09:47 PM   #8
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Re: Spark plug gapping?

Quote:
Originally Posted by dreamstang View Post
some people have a bad habbit of not checking plug gaps when installing new plugs. certain plugs work for many makes and models but some of those use different plug gaps. so alot of times the plug will not have the right gap per vehicle. so plugs gaps should always be checked. also there is usually a sticker under the hood somewhere that says the gap. even though azure already confirmed the proper one. just for future reference.
Yea most of the plugs like autolite are around 40,,they acually look funny because you have to stretch them out to get your gap,,
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Old 09-06-2012, 09:47 PM   #9
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i prefer chiltons. but usually haynes are more easily attainable.

like i said though usually the plug gap info is under the hood on a sticker. unless its like mine and doesnt have any stickers.
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Old 09-06-2012, 09:50 PM   #10
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No, don't ditch the Haynes. I usually like to keep another handy in case something doesn't look right or doesn't look complete, you can double check using the other book. Right now I have chiltons and alldataDIY online for my backup. I want to pickup a service manual too, but just haven't gotten around to it yet.
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Old 09-06-2012, 09:55 PM   #11
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No, don't ditch the Haynes. I usually like to keep another handy in case something doesn't look right or doesn't look complete, you can double check using the other book. Right now I have chiltons and alldataDIY online for my backup. I want to pickup a service manual too, but just haven't gotten around to it yet.
i want one to. but by now there isnt to many nuts and bolts i havent touched on my car so it almost wouldnt be worth it, of course unless i found a deal.
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Old 09-06-2012, 09:57 PM   #12
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i want one to. but by now there isnt to many nuts and bolts i havent touched on my car so it almost wouldnt be worth it, of course unless i found a deal.
Yeah for you it's like pickin your nose!

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Old 09-06-2012, 09:58 PM   #13
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Yeah for you it's like pickin your nose!

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-->you know your way around it<--
lmao. that i do. haha
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Old 09-06-2012, 10:01 PM   #14
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Quote:
Originally Posted by Azure

Yeah for you it's like pickin your nose!
Well thanks for the info boys I've already been pullin the new motorcraft ones back out and puttin gap back to where they were... Dang autolite plugs I hate Em...
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Old 09-06-2012, 10:02 PM   #15
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your welcome.
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Old 09-06-2012, 10:03 PM   #16
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Re: Spark plug gapping?

Just an FYI for those that do have, the chart is in your Owners Manual. I have mine gapped to .052
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