5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Motorcraft spark plug

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Old 08-07-2015, 01:09 PM
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Glyn
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Default Motorcraft spark plug

What is the correct motorcraft plug for my 1990 5.0?
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Old 08-07-2015, 03:06 PM
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Boss_Hotrod
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Not sure on Motorcraft but it should be autolite 26's if you have stock heads.
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Old 08-07-2015, 10:41 PM
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mjr46
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iirc it's 25's not 26's
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