4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

Spark plug gapping

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Old

Mar 9, 2012 | 02:58 PM

#1

cobhclambofgod

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Joined: Dec 2008

Posts: 7

From: Kansas

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Spark plug gapping

Hey guys quick question I'm replacing my spark plugs and I was wondering what you all recommend for the gapping?

I've got 3.73 gears, cat less h pipe, cat back, and k&n intake

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Old

Mar 9, 2012 | 03:05 PM

#2

TRUEBLUE3934

4th Gear Member

Joined: Sep 2009

Posts: 1,481

From: NC

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I think the factory suggested gap is 0.054.
This should be listed on the sticker under the hood, or in the owner's manual.

For nitrous cars, we gap at 0.035.

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Old

Mar 10, 2012 | 08:33 AM

#3

supersnake67

2nd Gear Member

Joined: Jul 2008

Posts: 248

From: Florida

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Thats what I gapped mine at is .054 the ngk's I bought were pretty close out of the box with just alittle tweaking.

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