Spark plug gap?
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Old February 10th, 2008, 09:49 AM   #1
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Spark plug gap?


I have a 306 with edelbrock performer heads what should i gap my plugs at? Also i pulled one of my plugs and it looks kinda white what does that mean to rich or to lean?
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Old February 10th, 2008, 11:47 AM   #2
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to white means lean
black or suity is rich
should just have a touch of brown look to it if mixture is right.
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Old February 10th, 2008, 11:49 AM   #3
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white is sometimes a bad head gasket to
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Old February 10th, 2008, 11:50 AM   #4
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true, if head gasket is suspected, do compression test and leakdown.
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Old February 10th, 2008, 01:12 PM   #5
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what gap are the ones in your car at, i gap at .054 but im all stock. anyway if yours are less then that you can open it up some more and thatll help richen it some to
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Old February 10th, 2008, 02:42 PM   #6
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The spark plug gap should be about .045" for a stock or mildly tuned normally aspirated street application.
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Old February 10th, 2008, 04:22 PM   #7
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34 is stock right?
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Old February 10th, 2008, 05:52 PM   #8
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k my manual and ford says gap from .052 to .054 for stock applications
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Old February 10th, 2008, 10:56 PM   #9
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Originally Posted by black88 View Post
I have a 306 with edelbrock performer heads what should i gap my plugs at? Also i pulled one of my plugs and it looks kinda white what does that mean to rich or to lean?
A perfect running engines plugs should be a nice chocolate brown color.
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Old February 11th, 2008, 12:05 AM   #10
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EFI motor plugs alway look white if you pull them after you putted around town or after the car has been idling.

They run like 15:1 at idle, which = white plug.

If you want to know what your car is doing at WOT, do a WOT pass, kill the engine, and check the plugs directly after the pass. Not after the return road, but immediately after the WOT pass.
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