1968 Shelby GT500

NOTE: This content came from the site oldfuelinjection.com. Since this site has recently become defunct, I am hosting the content here as a favor to those in the automotive community. I did not author this content, I am not claiming ownership, and I cannot warrant the accuracy in any way. Use it at your own risk!


History of Ford computers

Four main styles of EFI programming

Simplified version of how fords EFI computer works

Sensors (main page)


Mass Air Flow (MAF)

Manifold Absolute Pressure Sensor (MAP)

Engine Coolant Temperature Sensor (ECT)

Air Charge Temperature (ACT)

Throttle Position Sensor (TPS)

Oxygen Sensor (HEGO)

Barometric Pressure Sensor (BP)

Vehicle Speed Sensor (VSS)

Knock Sensor (KS)

EGR Valve Position sensor (EVP)

Actuators (main page)

Fuel Injectors

Idle Air Bypass (IAB)

Thick Film Ignition (TFI)

Fuel Pressure Regulator (FPR)


EGR Vacuum Regulator (EVR)

Begining an EFI Swap

TroubleShooting EFI Problems

Magazine Articles

Wire Harness (main page)

4.6L wire diagrams

Other 5.0L Car computers

Truck computers

Early Bronco Wiring Diagrams

How to solder

Wire gauge size chart

Sources for EVTM‘s

Mustang EVTM downloads

Truck EVTM downloads

How the EEC-IV Computer Connector Comes Apart

OBD-II E4OD Mass Air conversion

1985-89 2.3L Turbo pinouts

EFI Abbreviations

EEC Vehicle Locations

EEC Program Codes

Reference Books

downloadable EFI Files

How To Run a Self-Test


Codes 11-32

Codes 33-58

Codes 59-74

Codes 75-99

Codes 111-171

Codes 172-223

Codes 224-525

Codes 526-586

Codes 587-656

Codes 657-998

What to do if you can get Codes from the Computer

TroubleShooting EFI Problems

Installing a 3G alternator

3G Alternator Voltage Regulator Replacement

Alternator files

Battery Cable Assembly

How to Set the timing on an EFI Ford

Fuel Injector Cleaning

Vacuum System and fixing leaks

10-pin Connector Fix

EFI Part # Cross Reference

Injector Firing Order

Fuel System

Digital Volt Meters

EFI Tools

EFI Performance Upgrades

Computer Performance Upgrades

Aftermarket EFI Computers

How to install a computer chip

How to Dyno

© 2002-2012 UNIVEX Automotive Institute.
oldfuelinjection.com, is not affiliated with Ford Motor Company."