Fox Body Mustang Mass Air Conversion Installation Instructions (86-88)

How To Install Fox Body Mustang Mass Air Conversion

Parts & Tools Required

• Conversion harness
• Cold air intake
• Mass air assembly
• Mass air compatible PCM (Manual transmission cars use a A9L or A3M processor) (Automatic transmission cars use A9P or C3W processor)

Installation Instructions

1. Remove your negative battery cable





2. Remove your existing air inlet system, and install a mass air tight induction





3. Take your mass air meter, and slide it into the coupler, making sure the meter electronics are parallel to the ground





4. Finish installing your inlet system, and tighten all clamps





5. Locate the rubber firewall grommet for the PCM harness





6. Using a long screwdriver, carefully puncture the boot, and remove the screwdriver





7. From inside the car, find the puncture hole you created in the grommet, and feed the screwdriver through it





8. Using quality electrical tape, attach the mass air conversion harness to the tip of the screwdriver, making the tape wrap as smooth as possible





9. From inside the car, carefully pull the screwdriver back through the grommet pulling the wires through





10. Remove the tape from the harness





11. Remove your kick panel along with the PCM, and remove the electrical connector from it





12. Release the 4 retaining tabs, and remove the black plastic harness guard





13. Using a small pick, or similar tool remove the red plastic pin retainer from the PCM harness plug


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14. Locate the wire running to either pin #37, or #57 of the PCM connector, we used #57




15. Cut the PCM harness wire and splice in the red wire from the mass air conversion harness into the PCM harness, using a butt connector, or by soldering





16. Locate the black wire running to either pin #40, or #60 of the PCM connector. We used pin #40





17. Cut the PCM harness wire, and splice in the black wire from the mass air conversion harness into the PCM harness using a butt connector, or by soldering





18. Click the pre-terminated tan wire from the mass air conversion harness into the empty terminal location #9





19. Click the pre-terminated blue wire from the mass air conversion harness into the empty terminal location #50





20. Locate the white wire, with the red tracer located in the #51 position, and use a tiny pick to release the terminal lock, and remove the wire from the connector





21. This wire will be snapped into place at empty terminal location #38





22. Locate the green wire with the black tracer located in the #11 position. Using a tiny pick release the terminal lock, and remove the wire from the connector





23. This wire will be snapped into place at terminal location #32





24. Re-install the red pin retainer by simply pushing it back into place





25. Group the harness together, and re-install the black plastic PCM harness guard





26. Back under the hood, make a few tape wraps around the mass air conversion harness, to keep the wires together





27. Route your harness where you'd like it. Pull any slack you need from inside the car





28. Install the supplied split loom tubing onto the harness





29. Cut it to length and retain the end with electrical tape





30. Make a wrap around the harness, route the tape through the split in the loom, and then tape the loom





31. Plug in the conversion harness to the mass air





32. Pull any extra harness slack back into the car




33. To keep everything nice and neat, use a few zip ties to keep everything together





34. Reconnect the PCM to the harness, and slide your PCM back into place, and re-install the kick panel





35. Remove the vacuum hose running from the intake manifold to the MAP sensor





NOTE:

This will now function as a barometric air sensor


36. Plug or cap off the open vacuum hose or port





37. Reconnect the negative battery cable, and double check your work, and you're all done