A9L computers (EEC-IV)...what year(s)???

Mike86Stang

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#1

• Mar 12, 2004

• #1

I gotta get a new EEC, anyone know what years came with the A9L calibration code?

 

Starscream88

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#2

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• #2

I think 90-92 5 speed 5.0's

 

Starscream88

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#3

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I got one stock in my car and its a 91,

 

Mike86Stang

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#4

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Thanks

 

jrichker

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#5

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Try bridging pins 40, 60 & 46 as I suggested, it should work and be much cheaper. Or simply ground the black\white wire to the chassis ground by the battery.

Copied from Steve89GT...

There are a few different varieties of computers... just a few different calibrations.. Here's the #'s of most of the maf
computers that are around. A9L and A9P are the most common.

1988 MANUAL 8LD
1988 AUTO 8LF
1989 MANUAL A9L, A9S
1989 AUTO A9P, A9T
1990-92 MANUAL A9L
1990-92 AUTO A9P
1993 MANUAL A3M
1993 AUTO C3W
1993 COBRA X3Z

 

S

Silentst2000

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#6

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• #6

What makes the A9L so special? Why are they the "hot" computer?

 

BlackFox5.0

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#7

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• #7

They have the most aggressive fuel curve from what I understand.

 

S

Silentst2000

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#8

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BlackFox5.0 said:

They have the most aggressive fuel curve from what I understand.

Click to expand...

But doesn't just about any aftermarket "chip" do a better job than what the stock A6L can do?

 

BlackFox5.0

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#9

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How many people want to get a custom chip over just a computer that can learn?

 

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Silentst2000

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#10

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BlackFox5.0 said:

How many people want to get a custom chip over just a computer that can learn?

Click to expand...

Cuz dem chips be addin 100 hp yo!



Ok, I see your point.

 

Mike86Stang

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#11

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• #11

jrichker said:

Try bridging pins 40, 60 & 46 as I suggested, it should work and be much cheaper. Or simply ground the black\white wire to the chassis ground by the battery.

Copied from Steve89GT...

There are a few different varieties of computers... just a few different calibrations.. Here's the #'s of most of the maf
computers that are around. A9L and A9P are the most common.

1988 MANUAL 8LD
1988 AUTO 8LF
1989 MANUAL A9L, A9S
1989 AUTO A9P, A9T
1990-92 MANUAL A9L
1990-92 AUTO A9P
1993 MANUAL A3M
1993 AUTO C3W
1993 COBRA X3Z

Click to expand...

Thanks for that list that'll come in handy.

As far as bridging the 46 & 40/60 I'm not sure that's the right idea. Maybe I'm wrong here but the EEC doesn't seem to "measure" or read any of the sensor out put's when I ground the Signal Return. Hence the super shoddy gas mileage. I can't even set my TPS voltage or anything & never seems to go into closed loop( when the engines warm, I might have the cycle mis named ) I'd like to fix the one I have so I don't have to wait for ship time, but that may not be an option....?

In any event the EEC should be under warrenty so I can get another at no cost.

On the current EEC I don't know what the calibration is on it so I want to get one I can easily distinguish.

 

jrichker

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#12

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• #12

Mstang see http://www.austincc.edu/cloud/tc_eec.htm and download ECC-IV diagram to get the computer internal diagram - lots of other good stuuf on the pagee too...

 

CobraWannabe

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Mar 13, 2004

#13

• Mar 13, 2004

• #13

I have a full Cobra conversion (including wiring harness). Will I benefit from an A9L?

 

BlackFox5.0

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#14

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• #14

CobraWannabe said:

I have a full Cobra conversion (including wiring harness). Will I benefit from an A9L?

Click to expand...

The Cobra computer is known to be "conservative". it is also calibrated for use with 24# injectors, with a 19# MAF meter.

CobraWannabe, check your PM's

 

9

90whitepony

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#15

• Mar 13, 2004

• #15

Not to change the subject or anything but I have an a9s that I got from a friend of mine cause he ordered a chip for an a9l and he had an a9s so I gave him mine was this a bad desition on my part.

 

Mustang5L5

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#16

• Mar 13, 2004

• #16

No, there is no real difference between the A9L and the A9S. The reason why the A9L is kind is because it was used from 89-92 while the A9S was '89 only. All of the '93 computers are emmissions oriented, and nobody wants an 86-88 speed density computer. So in reality, there really is only 1 5-spd computer anyway!

 

astronut1885

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#17

• Mar 13, 2004

• #17

Glad I read this thread. I never knew why people always wanted the A9L. Hopefully at some point, I'll be able to grab one.

 

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90whitepony

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#18

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• #18

Ok but heres anouther question.When I had the a9l after I put my heads and everything else on I had a surge only when I started it warm and it would surge so bad it would usally stall unless I kept it running but it only did this starting it warm.Cold it would start right up.But with the a9s it still surges a little but not bad at all.Can anyone explain that.