MAF conversion not working
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
Double check wiring diagrams between the truck computer and the A9L. There are a couple different pin locations between the two. The A9L also needs 2 O2 sensor inputs, but you can split one and it should work fine. I'm not sure how the 95 truck computer is wired, so I'm not sure the exact differences between that and the A9L.
Thread Starter
|
Junior User
Joined: May 2003
Posts: 91
Likes: 0
From: bainbridge, ga
Originally posted by EPNCSU2006
Double check wiring diagrams between the truck computer and the A9L. There are a couple different pin locations between the two. The A9L also needs 2 O2 sensor inputs, but you can split one and it should work fine. I'm not sure how the 95 truck computer is wired, so I'm not sure the exact differences between that and the A9L.
Double check wiring diagrams between the truck computer and the A9L. There are a couple different pin locations between the two. The A9L also needs 2 O2 sensor inputs, but you can split one and it should work fine. I'm not sure how the 95 truck computer is wired, so I'm not sure the exact differences between that and the A9L.
Senior User
Joined: Jan 2003
Posts: 383
Likes: 1
From: Newport News USA
No, don't try putting the wrong inj. and plug firing order on the 15 order cam. You'll be lucky if ya get it to fire up at all, if you do that. When you pull the plug from the MAF sensor, what does it do when ya gun the throttle? It's not going to do a heck of a lot when it's idling and unplugged, but with the throttle opened up, it should give ya some problems... some pretty noticeable problems.
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
I don't know for sure the exact differences between a 95 MAF truck computer and the mustang computer. If you can get a wiring diagram for a 95 truck, compare it with a 1990 Mustang computer wiring . The A9L uses an oxygen sensor in both exhaust headers on mustangs, so you need to have an input to both pins on the computer. I split the one wire from the truck and ran it to both pins on the computer.
Lead Driver
Joined: Sep 2002
Posts: 9,549
Likes: 2,034
From: North Texas
You sure the electronics on the MAF are okay? You should be able to run tests to check it out.
When I used to unplug a MAF on a cammed vehicle the idle would stumble before I plugged it in.
Also remember the A9L is the T5 Mustang computer NOT the AOD one. Sell that A9L and get a C3W1, A3M1, A9P, etc.
When I used to unplug a MAF on a cammed vehicle the idle would stumble before I plugged it in.
Also remember the A9L is the T5 Mustang computer NOT the AOD one. Sell that A9L and get a C3W1, A3M1, A9P, etc.
Elder User
Joined: Sep 2002
Posts: 525
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic 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
Senior User
Joined: Jan 2003
Posts: 404
Likes: 0
I would not be to conserned about the firing order for the injectors. i talked to Ford motorsports about firing orders of the injectors because i installed a 89 mustang mass air EFi system on my 1970 302 they told me the switching the order made hardly any difference its only a small amount of efficency, but not noticable and i have had no problems with not changing the injector order for the last 2 years.
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
I installed an A9L (89 mustang computer) in my 87 F150 recently. I got injectors 1 and 2 plugged in backwards and had a very noticeable hesitation. It will run if they aren't right, yes, but it won't run as well as it can run.
Senior User
Joined: Jan 2003
Posts: 404
Likes: 0
the ford motorsports guy told me to think about how many times a second a injector fires and about duty cycle. hell the batch fire works fine and its blasting fuel and doesnt know when the valve is going to open.
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
Yes, but remember if the injectors are out of sequence, some cylinders may wait longer to get fuel than others and it will run rough. Batch fire fires 4 injectors that are sequential in the firing order, but if you fire 2 out of sequence, it's not quite the same result. I got two plugged up backwards, and I could tell a difference when I switched the wiring to the correct injector. It's much less noticeable at upper rpm's because like you said, the injectors are firing many times per second, but at idle it could cause a slight stumble or miss.
Thread Starter
|
Junior User
Joined: May 2003
Posts: 91
Likes: 0
From: bainbridge, ga
Originally posted by Hit Man X
You sure the electronics on the MAF are okay? You should be able to run tests to check it out.
When I used to unplug a MAF on a cammed vehicle the idle would stumble before I plugged it in.
Also remember the A9L is the T5 Mustang computer NOT the AOD one. Sell that A9L and get a C3W1, A3M1, A9P, etc.
You sure the electronics on the MAF are okay? You should be able to run tests to check it out.
When I used to unplug a MAF on a cammed vehicle the idle would stumble before I plugged it in.
Also remember the A9L is the T5 Mustang computer NOT the AOD one. Sell that A9L and get a C3W1, A3M1, A9P, etc.
Senior User
Joined: Jan 2003
Posts: 383
Likes: 1
From: Newport News USA
The MAF has no clue what the firing order is of either plugs or the injectors, so you don't have to worry about that. You can tell what what flow injectors you have by the color of them: gray=14lbs/hr, orange=19lbs/hr, blue-24lbs/hr, red=30lbs/hr... there's a few others, but you'd better not have them or something funky happened.