5.0L (1979-1995) MustangTechnical 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.
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What's the difference(s) between a A9L and a A9M ECMs ??
RE: What's the difference(s) between a A9L and a A9M ECMs ??
only thing that sucked about the auto puter was that every time you started it or shifted gears the rpms would jump up
Yeah I've noticed that in mine too, but I swap the transmissions a bit. That's good to know what causes that. I never understood why it did that, but it never got on my nerves. I guess that's why it idles at 900rpm until I come to a complete stop, then it goes down to 500. You can't even tell I have a cam while i'm rolling & it's in neutral... I have to be at a complete stop.
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