What are the differences between an A9L & an A9M EEC-IV ?

[KKKKatmandu]

What's the difference(s) between a A9L and a A9M ECMs ??

[85ksp]

They are both for 5.0 5-speed mass air cars.. I personally think all those computers are the same.. A9P is automatic

[KKKKatmandu]

Originally Posted by KKKKatmandu

What's the difference(s) between a A9L and a A9M ECMs ??

Just found out the A9M is for Automatic cars and A9L is for manual cars.

My car is a Manual and has a A9M ECM. ???? What gives ???

[Gmoney5.0Mustang]

Are you sure about that? I have a 90 conv. with an AOD and I have an A9P!!

[Gmoney5.0Mustang]

I think you have it backwards!!

[brian97cobra]

u sure u do not have an A3M computer. thats a 5-speed computer that came in a 93 mustang V8 ???

A9L is for manual also

A9P is for auto

[KKKKatmandu]

Originally Posted by Gmoney5.0Mustang

I think you have it backwards!!

Actually.....I don't.

According to www.Fordfuelinjection.com.

A9L 5.0 89-93 Mustang MAF / Manual (see note 1)
A3M 5.0 89-93 Mustang MAF / Manual (see note 1)
A3M1 5.0 89-93 Mustang MAF / Manual (see note 1)
S0Z 5.0 89-93 Mustang MAF / Manual (see note 1)
D3D1 5.0 89-93 Mustang MAF / Manual (see note 1)
A9M 5.0 89-93 Mustang MAF / Auto (see note 1)
A9P 5.0 89-93 Mustang MAF / Auto (see note 1)
C3W 5.0 89-93 Mustang MAF / Auto (see note 1)
C3W1 5.0 89-93 Mustang MAF / Auto (see note 1)
A9T 5.0 89-93 Mustang MAF / Auto (see note 1)
A9S 5.0 88-93 CA Mustang MAF / Manual (see note 1)

Note 1: Can be tuned by a chip into the J3 service port.

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I also found this info......

A9L's and A9M's interchange and dont really care what transmission they have. I believe the A9M has a little bit higher idle strategy than the A9L so it may idle a little different when in a 5spd car, but other than that they do not affect driveability or performance,