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.

A9P - A9L Differences?

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Old 06-16-2008, 12:04 PM
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tw3ak
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Default A9P - A9L Differences?

I know the A9P are the automatic computers. But whats the big difference between the two? Are they interchangeable with no problems? I thought i read somewhere I would need an extra harness for the A9L if comming from the A9P.
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Old 06-16-2008, 12:08 PM
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redpony88
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Default RE: A9P - A9L Differences?

nah you dont need to add in a new harness or anything, the a9p has more aggressive fuel curves than the a9l they work just fine, i ran one in my 88 when i converted it over to maf
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