88 fox MAF conversion

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Frank69

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Jul 10, 2018

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NL, Canada

Jul 10, 2018

#1

• Jul 10, 2018

• #1

Hey folks, new to this forum
Anyway I have a 88 mustang converted to manual, now I want to convert it to MAF. I have a A3M1 ecu but my biggest issue is that from all the info I’ve read online, the O2 jumper wire has to be correct. When I checked mine doesn’t have one at all. Will this be a problem trying to convert to mass air?

 

Blown88GT

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Nov 13, 1999

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Palm Beach Gardens, FL

Jul 10, 2018

#2

• Jul 10, 2018

• #2

No O2 mod required on '88 GT MT. A3M1 is unfamiliar to me.
Knowing that you car is an '88 is not enough.
Found this & there is more.
http://forums.corral.net/forums/gen...nual-auto-differences-year-differences-3.html

 

F

Frank69

New Member

Jul 10, 2018

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NL, Canada

Jul 10, 2018

#3

• Jul 10, 2018

• #3

Blown88GT said:

No O2 mod required on '88 GT MT. A3M1 is unfamiliar to me.
Knowing that you car is an '88 is not enough.
Found this & there is more.
http://forums.corral.net/forums/gen...nual-auto-differences-year-differences-3.html

Click to expand...

The car is an 88 GT, originally aod, changed to 5 speed. I haven’t took the original ecu out yet to know exactly what it is. The engine has been modified with a E303 cam and ford racing heads. Right now it runs like garbage, banging and back firing. When I checked it recommended MAF for that cam. Glad to know the O2 don’t need changing. Thanks!

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

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Jul 10, 2018

#4

• Jul 10, 2018

• #4

Earlier '88 did not have the jumper. Later '88 (like mine) did. The cars are wired differently so it shouldn't be an issue.

You still want to go ahead and check pin 46 for voltage during crank and run.

This question frequently comes up with 87 guys doing the same swap as there is no jumper on those at all. The problem is the factory wiring diagrams don't differentiate for the 1988 model year the wiring differences between the early models sans jumper and the later ones with

 

Last edited: Jul 10, 2018

Blown88GT

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Nov 13, 1999

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Jul 11, 2018

#5

• Jul 11, 2018

• #5

A3M1 looks okay. Probably not much different from the A9L.
http://web.archive.org/web/20131229165710/http://oldfuelinjection.com/?p=17

 

Reactions: Frank69

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Frank69

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Jul 10, 2018

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NL, Canada

Jul 12, 2018

#6

• Jul 12, 2018

• #6

Blown88GT said:

A3M1 looks okay. Probably not much different from the A9L.
http://web.archive.org/web/20131229165710/http://oldfuelinjection.com/?p=17

Click to expand...

Thanks for ur help