5.0 Conversion To MAF

howie1145 · Dec 12, 2011

I'm a newcomer when it comes to "new" mustangs, my experience is in classic mustangs (64 1/2 & 67)

I have a '67 Mustang convertible and I am trying to install a engine from an '87 5.0 Mustang EFI use in my class '67 convertible.

I am trying to make it a Mass-Airflow system, I have an engine wiring harness from a '93 Mustang and a A9L computer. The problem I am having is I can't figure out wiring, how to hookup the ignition to sync with the computer so the car will start.

Thanks again for everyones time and help. thanks all !!!

jrichker · Dec 12, 2011

Duplicate the wiring from a 5.0 91 EFI Mustang.

Starter solenoid wiring for 86-91 Mustang

Use 30 amp fuse for two 14 black/orange gauge wires from the starter solenoid to the EEC relay
Use a 20 amp fuse for one 12 gauge wire from the starter solenoid to the fuel pump power relay.
Use a 10 amp fuse for the 16 gauge red/green wire from the ignition switch to ignition coil and TFI.
Use a 10 amp fuse for the O2 sensor heater circuit orange/yellow wires.

Be sure to ground the two black/white wires coming out of the computer to the battery negative cable pigtail.

Diagram courtesy of Tmoss & Stang&2birds

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5.0 Conversion To MAF

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