SEFI conversion
Thread Starter
|
Freshman User
Joined: Aug 2003
Posts: 25
Likes: 0
From: Cheyenne, Wyoming
SEFI conversion
I am trying to figure out what computer would be the best ot use on my 90'mustang GT 5.0 HO Mass air that I am installing into my Early Bronco. The A9L or A9P?
Senior User
Joined: Mar 2003
Posts: 132
Likes: 0
SEFI conversion
If you use an A9L (stick) in a wiring harness for an A9P (auto) the A9L will be fried unless you pull a certain wire out. Get a book on Ford fuel injection. Motorbooks has one to add to the one above. Good luck and enjoy!
Thread Starter
|
Freshman User
Joined: Aug 2003
Posts: 25
Likes: 0
From: Cheyenne, Wyoming
SEFI conversion
Thanks, I will look for a good book. Those CPU's are expensive and it would be a shame to fry one.
Trending Topics
Senior User
Joined: Jul 2003
Posts: 270
Likes: 1
From: tampa bay area
SEFI conversion
A friend of mine has been running an A9L with non-electric AOD in his 86 Mustang for years without any problems. I don't recall removing any wires to make it work. We did have to install a mass air conversion harness into the existing 86 harness because the 86 was origionally speed density. But those wires went into the plug where there were empty holes.
Now I'm interested cause I am putting in this exact combo into my 92 Ranger.
Now I'm interested cause I am putting in this exact combo into my 92 Ranger.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Senior User
Joined: Jul 2003
Posts: 270
Likes: 1
From: tampa bay area
SEFI conversion
The kit was from Pro-M if memory serves. This was back when the Mustang thing was in it's infancy. It definately was not a ford conversion harness. It had the stock 302 HO with the AOD already there. I don't know if a previous owner swapped transmissions. I don't know if it started in gear or not.
I have a guy waitin on money for his A9L. I'm gonna tell him to hold on for a few until I hear more on this.
Come to think of it, I believe we had to move one wire or mabey two from one position to another in the plug that goes into computer itself. I am next to certain that the instructions on the conversion harness said those were for emissions functions though.
I will try to run this past my local Mustang speed shop and see what input they have.
I have a guy waitin on money for his A9L. I'm gonna tell him to hold on for a few until I hear more on this.
Come to think of it, I believe we had to move one wire or mabey two from one position to another in the plug that goes into computer itself. I am next to certain that the instructions on the conversion harness said those were for emissions functions though.
I will try to run this past my local Mustang speed shop and see what input they have.
Senior User
Joined: Mar 2003
Posts: 132
Likes: 0
SEFI conversion
Pin 30 goes to Neutal Drive switch on autoamatics and Neutral Gear switch on manual. You had to move Thermactor wires to different pins and add Vehicle Speed Sensor and Airflow Meter wires. Maybe a few others.
Senior User
Joined: Jul 2003
Posts: 270
Likes: 1
From: tampa bay area
SEFI conversion
The thermactor wires are exactly what we moved now that you mention it.
The car didn't have a speed sensor and we never installed one. The car still runs great today and the lack of the speed sensor didn't seem to have any adverse effects on it.
I don't remember moving any other wires but we did this about 9 years ago or so.
Is there really that much of a difference between the auto and stick computers as far as performance? I know that everyone salivates over the A9L but I have never heard how big of a difference it really was. I was drooling just cause everyone else was I guess.
The car didn't have a speed sensor and we never installed one. The car still runs great today and the lack of the speed sensor didn't seem to have any adverse effects on it.
I don't remember moving any other wires but we did this about 9 years ago or so.
Is there really that much of a difference between the auto and stick computers as far as performance? I know that everyone salivates over the A9L but I have never heard how big of a difference it really was. I was drooling just cause everyone else was I guess.
Senior User
Joined: Mar 2003
Posts: 132
Likes: 0
SEFI conversion
That frying the cumputer stuff came right out of a Ford Windsor Small Block Performance book. Also mentioned 92+ computers retard timing at high rpm to protect hyperuetic pistons and input shafts during high rpm shifts. Think maybe the auto version has higher idle.