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I have a 1990 bronco with a 5.0 and a 5 speed and recently acquired a 96 5.8 f150. The f150 is mass air and everything it's there but I want to know what I'm getting myself into so I have a few questions. First will the 96 5.8 harness swap directly onto my 5.0? Second will the computer work from the OBDII 5.8 on the OBD1 5.0 and will it matter if the donor truck parts are being swapped from an E4OD into a manual bronco or do I need a different computer?

'92 Custom w/ '95 MAF 5.0 M/T, 33's, 4.10 LSD
4,020 Posts
OBDI and OBDII computers and harnesses are not interchangeable.

The E4OD computer will work fine with a M/T. It may store some non-displayed codes for not receiving the transmission signals, but that's about it.

Super Moderator
33,256 Posts
Yo Sludge,
MAF Upgrade in a 90 by Seattle FSB @ MAF Upgrade - Lessons Learned Thread

Speed Density to Mass Air Conversion & Parts List with Cost for Bronco & F 150
Source: by Ryan M (Fireguy50) at
Speed Density to Mass Air Conversion & Parts List with Cost for Bronco, F 150 & Mustang
Source: by C. Asaravala at via
Speed Density to Mass Air Conversion & Parts List with Cost in a 93 F150, 5.0, E4OD; "...For this article, I will be doing a 93 Ford F-150, 5.0, E4OD trans. Because they don't make a kit for this, I will be re-wiring the harness, and using a PCM and MAF out of a 95 f-150, 5.0, E4OD. If you have a truck with a non-electronic Trans, like the old AOD's, or C-6's, etc, you can use a MAF conversion kit..." Read More
Source: by Mike C at
Speed Density to Mass Air Conversion for Bronco & F 150; "...To convert SD trucks with E4OD/AODE transmissions to MAF, some people use the CA 5.8 MAF/E4OD (F5TF-12A650-BYA). Mike Wesley says he uses the F5TF-12A650-HB (95 CA 5.0 MAF/E4OD) on a 750+ HP daily driver 415 stroker Lightning with a Vortech S trim. It runs open loop, has been reprogrammed, drives like stock, gets 17 MPG and will run low 10’s at 130+ in the 1/4 mile and A/C and cruise work great. Both of these EEC’s are set to use 4.10 gears. If a smaller ratio is used, say 3.55, you could use the F5TF-12A650-GB. There are probably 15-20 EEC’s available to convert a SD (later model) to MAF (some of these may compromise the ability to stay emissions legal). If you have an early SD truck with AOD, re-wire to the Mustang EEC (Ford MotorSport sells this kit). You’ll have to move/add quite a few wires, and you might not like the results if you’re not able to re-calibrate the EEC (like the Pro-M ’low cost’ kit, Kenne Bell, LCA and Downs Ford come pre-re-calibrated). The engine shuts down at 85 MPH, shifting is fairly sloppy and too early (at least on a Lightning). All Ford EECs shift poorly -- except for the Lightning, which is only slightly firmer. To use the Mustang EEC on a truck with an E4OD/AODE, you would need to run two EECs in parallel. The Mustang EEC runs the engine, the existing truck EEC controls the trans. Pro-M sells a kit like this..." READ MUCH MORE
Source: by Tom C via Ryan M (Fireguy50)

Here are the:
1990 Bronco Pre-Delivery Shop & Electrical & Vacuum Troubleshooting Manuals (EVTM), Partial by member Kingfish999 in Google Drive @ 1990 Ford Truck service manuals - Google Drive
1990 Ford Truck Emissions Manual.pdf by Ford via member 90.CaliBronco in Google Drive @ 1990 Ford Truck Emissions Manual.pdf

Suggest you download both for faster scrolling and to use the table of contents index.

1990 Ford Bronco Brochure by Ford via Dezo's Garage @

Haynes Red Manual for 80-95 Bronco & F Series @ Hanes guide 80-96 bko f series.pdf found by Mrs BroncMom!

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