[Lowerednjuiced]

1989 2.3 MAF conversion installed - doesn't work!
I just installed a MAF system from a 1991 2.3L Mustang in my 1989 2.3L Mustang automatic today and it doesn't work at all. (non-turbo)

I removed the MAP sensor hose and plugged it off. Then started the engine and it was burbling. We put the hose back in the MAP sensor with the MAF plugged in and it was running perfect again. Unplugging the MAF does nothing to change the way the engine runs.

Here is the wiring info:
A to pin 37
B to pin 60
C to pin 9
D to pin 50

MAF is part number F0VF-12b579-A2C
The ECU is a 8CB - E8TF-12A650-CT3A EEC-IV
The ECU and MAF are from good running cars and we tried the same 8CB ecu that came out of this car but still nothing. The wiring is correctly installed.
So where are we going wrong? Do we need an ECU from a 1991 2.3L Mustang? The ignition system is different on the 1991 2.3L - 8 spark plugs.

Any help would be appreciated!

[dakine858]

Originally Posted by Lowerednjuiced

1989 2.3 MAF conversion installed - doesn't work!
I just installed a MAF system from a 1991 2.3L Mustang in my 1989 2.3L Mustang automatic today and it doesn't work at all. (non-turbo)

I removed the MAP sensor hose and plugged it off. Then started the engine and it was burbling. We put the hose back in the MAP sensor with the MAF plugged in and it was running perfect again. Unplugging the MAF does nothing to change the way the engine runs.

Here is the wiring info:
A to pin 37
B to pin 60
C to pin 9
D to pin 50

MAF is part number F0VF-12b579-A2C
The ECU is a 8CB - E8TF-12A650-CT3A EEC-IV
The ECU and MAF are from good running cars and we tried the same 8CB ecu that came out of this car but still nothing. The wiring is correctly installed.
So where are we going wrong? Do we need an ECU from a 1991 2.3L Mustang? The ignition system is different on the 1991 2.3L - 8 spark plugs.

Any help would be appreciated!

Yes you need the ECU. It'll work with the ignition system you have. Yeah the 91' 2.3L is kinda weird in that it has dual plug heads. You'll also need a power programmer to correctly adjust the ECU's ignition settings.

[Lowerednjuiced]

Whats a Power Programmer?

[kcolraw1313]

I just tried the maf conversion on my 1988 2.3l mooootang. The correct pins for the maf are

A to pin 37
B to pin 60
C to pin 15
D to pin 14

You do need a Computer from a MAF car.

Info found via. "Alldata" online and autozone online repair manual. I ran into a problem with a lean crappy idle and lean at WOT. reverted to speed density for the time being, till its figured out.

(used stock maf and injectors, 19# injectors and two different 5.0l 19# mafs)

[Twizzler13]

I want to do the mass air conversion on my 89 2.3L so if you guys figure out what is going wrong and post it I would be very interested.

I have been trying to find info on how to do this for a while and all I ever find is how to do it on the 5.0L cars.

Is there a better year of ecu to use other than 91 that doesn't have the dual plugs so you don't have to do any reprogramming?

I assume that the pin layout that is posted you splice into the wires going to those pins with the wires from the mass air sensor?

Hope you guys get this working as I really want to do it.

[mustangpro]

What's the advantage to upgrading to MAF?

[Twizzler13]

From what I know the biggest advantage is much higher tolerances for modifications versus speed density.

With speed density you can't adjust or do many modifications. Yhe EEC can't compensate for them so your car will run like crap, crappy mileage etc.

I believe maf gets better mileage as well depending on what mods you do.