1990 Gt Automatic A9l Computer will it fit a standard?

[NewToFord]

I have a 1990 a9l ecm. The car was an automatic. Will this fit standard transmissions, as well as other years? Thanks.

 

[NewToFord]

also will the ecm harness interchange from an auto to a standard? thanks.

 

[HISSIN50]

Was it a factory auto trans car? If so, you can reuse your A9P if you desire.

A9L's came in manual tranny cars.

There's a slight difference in the way the cranking circuit and the O2 harnesses are wired between the cars, but you can use either EEC with either harness (after rewiring/repinning if mixing and matching).

 

[NewToFord]

my mistake. It is a A9P. Can this be used in a standard trans car? How about the harness, is that interchangable between autos and standards? I am not talking about using these two pieces together. I have somebody who wants each piece, and both people have standards. So these two pieces will both be going on standard trans cars. thanks

 

[larrym1961]

I was told by the head electronics guru @ Ford Racing tech that on Mass air equipped 5.0 Mustangs, you can use a auto trans computer on a 5 speed car, but a 5 speed computer can NOT be used on an Auto car. He also mentioned to me that actually a little known fact is that the Auto trans computer had just a little hotter tune in it than the manual trans computer. Ive used both in my 5 speed Mustang and they both seem to work the same!

 

[ttopstang]

I'm running an A9P "automatic" computer in my 5speed car with no problems.

 

[HISSIN50]

Both puters can be used both ways. The puter doesn't know which trans is connected to it. Do note the difference in the wiring between a factory auto and 5 speed car however.

The A9P has more timing off idle (to accommodate the converter).

 

[NewToFord]

Both puters can be used both ways. The puter doesn't know which trans is connected to it. Do note the difference in the wiring between a factory auto and 5 speed car however.

The A9P has more timing off idle (to accommodate the converter).

are you talking about the ecm wiring or other wiring? Thanks

 

[HISSIN50]

are you talking about the ecm wiring or other wiring? Thanks

There's a slight difference in the way the cranking circuit and the O2 harnesses are wired between the cars, but you can use either EEC with either harness (after rewiring/repinning if mixing and matching).

.